Relevant bibliographies by topics / Cementitious composite

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Cementitious composite'

Author: Grafiati
Published: 4 June 2021
Last updated: 25 April 2022

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Journal articles on the topic "Cementitious composite"

1

Yuan, Fang, Jinlong Pan, and Christopher KY Leung. "Elastoplastic time history analysis of reinforced engineered cementitious composite or engineered cementitious composite–concrete composite frame under earthquake action." Advances in Structural Engineering 20, no. 4 (June 26, 2016): 491–503. http://dx.doi.org/10.1177/1369433216655809.

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Engineered cementitious composite is a class of high-performance cementitious composites with pseudo-strain hardening behavior and excellent crack control capacity. Substitution of concrete with engineered cementitious composite can greatly reduce the cracking and durability problems associated with low tensile strength and brittleness of concrete and can significantly increase structural seismic resistance. In this article, a pair of beam–column joints with various matrix types has been tested under reversed cyclic loading to study the effect of substitution of concrete with engineered cementitious composite in the joint zone on the seismic behaviors of composite members. After that, a simplified constitutive model of engineered cementitious composite under cyclic loading is proposed, and the structural performance of steel reinforced engineered cementitious composite members is simulated by fiber beam elements. The accuracy of the model is verified with test data. Finally, three frame structures with different matrixes subjected to earthquake actions were numerically modeled to verify the contribution of ductile engineered cementitious composite material to structural seismic resistance. The seismic responses or failure mechanisms, deformation patterns, and energy dissipation capacities for each frame structure are analyzed and compared. The simulation results indicate that the application of engineered cementitious composite can reduce the maximum story drift ratio, and the distributions of the dissipated energy are more uniform along the building height when engineered cementitious composite is strategically used in ground columns and beam–column joints of the frame structure. The seismic performance of the reinforced engineered cementitious composite-concrete composite frame is found to be even better than the frame with all concrete replaced by engineered cementitious composite.
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Zhang, Peng, Qing-fu Li, Juan Wang, Yan Shi, and Yi-feng Ling. "Effect of PVA fiber on durability of cementitious composite containing nano-SiO2." Nanotechnology Reviews 8, no. 1 (October 26, 2019): 116–27. http://dx.doi.org/10.1515/ntrev-2019-0011.

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Abstract In the current investigation, the influence of polyvinyl alcohol (PVA) fibers on flowability and durability of cementitious composite containing fly ash and nano-SiO2 was evaluated. PVA fibers were added into the composite at a volume fraction of 0.3%, 0.6%, 0.9%, and 1.2%. The flowability of the fresh cementitious composite was assessed using slump flow. The durability of cementitious composite includes carbonation resistance, permeability resistance, cracking resistance as well as freezing-thawing resistance, which were evaluated by the depth of carbonation, the water permeability height, cracking resistance ratio of the specimens, and relative dynamic elastic modulus of samples after freeze-thaw cycles, respectively. The results indicated that addition of PVA fibers had a little disadvantageous influence on flowability of cementitious composite, and the flowability of the fresh mixtures decreased with increases in PVA fiber content. Incorporation of PVA fibers significantly improved the durability of cementitious composites regardless of addition of nano-particles. When the fiber content was less than 1.2%, the durability indices of permeability resistance and cracking resistance increased with fiber content. However, the durability indices of carbonation resistance and freezing-thawing resistance began to decrease as the fiber dosage increased from 0.9% to 1.2%. The fiber reinforced cementitious composite exhibited better durability due to addition of nano-SiO2 particles. Nano-SiO2 particle improves microscopic structure of fiber reinforced cementitious composites, and the nano-particles are beneficial for PVA fibers to play the role of reinforcement in cementitious composites.
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Dong, Fangyuan, Jiangtao Yu, Kaili Zhan, and Zhanhong Li. "Seismic fragility analysis of two-story ultra-high ductile cementitious composites frame without steel reinforcement." Advances in Structural Engineering 23, no. 11 (April 13, 2020): 2373–87. http://dx.doi.org/10.1177/1369433220912350.

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This article numerically studies the seismic vulnerability of the frame structure made of ultra-high ductile cementitious composites without longitudinal and transverse reinforcement. A non-linear finite element model is established with the help of Open System for Earthquake Engineering Simulation and calibrated by shaking table test results on an ultra-high ductile cementitious composite-RC frame whose seismic vulnerable parts were replaced by ultra-high ductile cementitious composites without steel reinforcement. Subsequently, an analysis on the structural seismic vulnerability is performed on pure ultra-high ductile cementitious composite frame structure based on the incremental dynamic analysis method. Finally, a seismic vulnerability matrix of the ultra-high ductile cementitious composite frame under various structural limit states is obtained from seismic fragility curves. Under the major earthquake of magnitude 7.5, the probability of ultra-high ductile cementitious composite frame structure under basically intact, slight damage, moderate damage, serious damage, and collapse is 14.2%, 48.1%, 31.7%, 5.3%, and 0.7%, respectively. The achieved results also demonstrate that the ultra-high ductile cementitious composite frame can satisfy the objectivity of “No collapsed under major earthquake” at least for major earthquakes of magnitude 8. It is demonstrated that the ultra-high ductile cementitious composite frame satisfies three-level performance objectivity stipulated in GB 50011-2010 and, thus, preliminarily verifying the feasibility for constructing structures just using high-performance concrete.
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Hou, Wei, Guan Lin, Xiaomeng Li, Pandeng Zheng, and Zixiong Guo. "Compressive behavior of steel spiral confined engineered cementitious composites in circular columns." Advances in Structural Engineering 23, no. 14 (June 15, 2020): 3075–88. http://dx.doi.org/10.1177/1369433220928528.

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Extensive research has been conducted on the uniaxial tensile and compressive behavior of engineered cementitious composites. Despite the high tensile ductility and high toughness of engineered cementitious composites, transverse steel reinforcement is still necessary for high-performance structural members made of engineered cementitious composites. However, very limited research has been concerned with the compressive behavior of steel-confined engineered cementitious composites. This article presents the results of axial compression tests on a series of circular engineered cementitious composite columns confined with steel spirals. The test variables included the engineered cementitious composite compressive strength, the spiral pitch, and the spiral yield stress. The test results show that steel-confined engineered cementitious composites in the test columns exhibited a very ductile behavior; the steel spiral confinement contributed effectively to the enhancement of both strength and ductility of engineered cementitious composites. The test results were then interpreted by comparing them with the predictions from some existing models. It was found that the existing models previously developed for confined concrete failed to predict the compressive strength of steel-confined engineered cementitious composites with sufficient accuracy. New fitting equations for the compressive properties of steel-confined engineered cementitious composites were then obtained on the basis of the test results of this study as well as those from an existing study.
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Zhang, Peng, Qingfu Li, Juan Wang, Yan Shi, Yuanxun Zheng, and Yifeng Ling. "Effect of Nano-Particle on Durability of Polyvinyl Alcohol Fiber Reinforced Cementitious Composite." Science of Advanced Materials 12, no. 2 (February 1, 2020): 249–62. http://dx.doi.org/10.1166/sam.2020.3680.

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In this study, the influence of nano-particle on flowability and durability of polyvinyl alcohol (PVA) fibers reinforced cementitious composite containing fly ash was evaluated. In the cementitious composite, Portland cement was replaced with 1.0%, 1.5%, 2.0% and 2.5% (by weight) of nano-particles. Two kinds of nano-particle of SiO2 and CaCO3 nano-particles were adopted in this study. PVA fibers were incorporated to the composite at a dosage of 0.9% (by volume). The flowability of the fresh cementitious composite was assessed using slump flow measurements. The durability of hardened cementitious composite includes carbonation resistance, permeability resistance, cracking resistance as well as freezing-thawing resistance, which were evaluated by the depth of carbonation, the water permeability height, cracking resistance ratio of the specimens, and relative dynamic elastic modulus of samples after freeze-thaw cycles, respectively. Our results showed incorporation of nano-particles had a little disadvantageous effect on flowability of PVA fiber reinforced cementitious composite, and the flowability of the fresh mixtures decreased with increases in the nano-particles content. The decrease in flowability of cementitious composite resulted by nano-SiO2 particles is more remarkable than nano-CaCO3 particles. The addition of both nano-SiO2 and nano-CaCO3 particles significantly improved the durability of PVA fiber reinforced cementitious composite. However, the improvement of nano-SiO2 on durability is much better than that of nano-CaCO3. When the amount of SiO2 nano-particle was less than 2.5%, the durability of cementitious composites increased with nano-SiO2 content. The microstructure of PVA fiber reinforced cementitious composite becomes much denser due to filler effect of nano-particle and generation of particles of hydrated products C–S–H gels. Both of SiO2 and CaCO3 nano-particle improved the microstructure of PVA fiber reinforced cementitious composite, and nano-SiO2 particles might be more beneficial for PVA fibers to play the role of reinforcement than nano-CaCO3 particles in the composites.
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Liu, Ting-Yu, Peng Zhang, Qing-Fu Li, Shao-Wei Hu, and Yi-Feng Ling. "Durability Assessment of PVA Fiber-Reinforced Cementitious Composite Containing Nano-SiO2 Using Adaptive Neuro-Fuzzy Inference System." Crystals 10, no. 5 (April 28, 2020): 347. http://dx.doi.org/10.3390/cryst10050347.

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In this study, the durability of polyvinyl alcohol fiber-reinforced cementitious composite containing nano-SiO2 was evaluated using the adaptive neuro-fuzzy inference system (ANFIS). According to the structural characteristics of the cementitious composite material and some related standards, the classification criteria for the evaluation indices of cementitious composite materials were clarified, and a corresponding structural framework of durability assessment was constructed. Based on the hypothesis testing principle, the required test data capacity was determined under a certain degree of accuracy, and durability experimental data and expert evaluation results were simulated according to statistical principles to ensure that there were sufficient datasets for ANFIS training. Using an environmental factor submodule as an example, 14 sets of actual test data were used to verify that the ANFIS can quickly and effectively mimic the expert evaluation reasoning process to evaluate the durability of cementitious composites. Compared with other studies related to the durability of cementitious composites, a systematic evaluation system for the durability of concrete was established. We used a polyvinyl alcohol fiber-reinforced cementitious composite containing nano-SiO2 to conduct a comprehensive evaluation of cementitious composites. Compared with the traditional expert evaluation method, the durability evaluation system based on the ANFIS learned expert experience, stored the expert experience in fuzzy rules, and eliminated the subjectivity of expert evaluation, thereby making the evaluation more objective and scientific.
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Zhang, Peng, Yonghui Yang, Juan Wang, Meiju Jiao, and Yifeng Ling. "Fracture Models and Effect of Fibers on Fracture Properties of Cementitious Composites—A Review." Materials 13, no. 23 (December 2, 2020): 5495. http://dx.doi.org/10.3390/ma13235495.

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Cementitious composites have good ductility and pseudo-crack control. However, in practical applications of these composites, the external load and environmental erosion eventually form a large crack in the matrix, resulting in matrix fracture. The fracture of cementitious composite materials causes not only structural insufficiency, but also economic losses associated with the maintenance and reinforcement of cementitious composite components. Therefore, it is necessary to study the fracture properties of cementitious composites for preventing the fracture of the matrix. In this paper, a multi-crack cracking model, fictitious crack model, crack band model, pseudo-strain hardening model, and double-K fracture model for cementitious composites are presented, and their advantages and disadvantages are analyzed. The multi-crack cracking model can determine the optimal mixing amount of fibers in the matrix. The fictitious crack model and crack band model are stress softening models describing the cohesion in the fracture process area. The pseudo-strain hardening model is mainly applied to ductile materials. The double-K fracture model mainly describes the fracture process of concrete. Additionally, the effects of polyvinyl alcohol (PVA) fibers and steel fibers (SFs) on the fracture properties of the matrix are analyzed. The fracture properties of cementitious composite can be greatly improved by adding 1.5–2% PVA fiber or 4% steel fiber (SF). The fracture property of cementitious composite can also be improved by adding 1.5% steel fiber and 1% PVA fiber. However, there are many problems to be solved for the application of cementitious composites in actual engineering. Therefore, further research is needed to solve the fracture problems frequently encountered in engineering.
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Wang, Zheng, Guangjun Zhang, and Min Yuan. "Nano-Silicon Dioxide-Optimized Cementitious Composite Material in the Restoration of Concrete Cracks in House Building." Science of Advanced Materials 13, no. 11 (November 1, 2021): 2167–77. http://dx.doi.org/10.1166/sam.2021.4139.

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This study aimed to investigate the restoration performance of nanocomposite materials used in house building. The ethyl orthosilicate was used as raw material, the sol–gel method was adopted to synthesize nano-silicon dioxide (SiO2), and the doped nano-SiO2 cementitious composite material was prepared. Then, the mechanical properties of the cementitious composite material based on different nano-SiO2 content was analysed through the characterization and performance test. The results showed that the nano-SiO2 prepared this time had regular crystal phases, small particle size, and certain thermal stability, with fully developed crystal grains. By analysing the mechanical properties of nano-SiO2 doped cementitious composites, it was found that the initial setting time and final setting time both showed an upward trend when the doped content of nano-SiO2 was less than 3%. Besides, the initial setting time and final setting time of cementitious composites decreased when the content was 3%–5%. The fluidity analysis indicated that the fluidity of cementified composites gradually dropped with the growth of nano-SiO2 content. The test results of mechanical properties of cementitious composites doped with nano-SiO2 revealed that the flexural strength and compressive strength of cementitious composites presented a trend of first rising and then falling, as the nano-SiO2 content rose. Shrinkage test results showed that the shrinkage rate of the gel composites increased with the growth of duration. The specific surface area and pore ratio measurement results indicated that the specific surface area of the cementitious composite doped with nano-SiO2 was 33.42 m2/g, and the porosity was small. In conclusion, the nano-SiO2-doped cementitious composite material synthesized in this study had good mechanical properties and could be applied in the repair of concrete cracks in house building.
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Merta, Ildiko, Ana Mladenovič, Janez Turk, Aljoša Šajna, and Alenka Mauko Pranjić. "Life Cycle Assessment of Natural Fibre Reinforced Cementitious Composites." Key Engineering Materials 761 (January 2018): 204–9. http://dx.doi.org/10.4028/www.scientific.net/kem.761.204.

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Three cementitious composites containing different natural fibres (flax, hemp and sea-grass) were evaluated from an environmental perspective by means of Life Cycle Assessment (LCA) method applying the cradle-to-gate approach. The environmental impact of these composites was compared to that of cementitious composites reinforced with conventional synthetic polyacrilonitrile (PAN) fibres. The functional unit was the production of one cubic meter of cementitious composites ready-for-use. The results show that generally the environmental footprint of composite with synthetic fibres is bigger than the footprint of the composites with added natural fibres. Exceptions may only be the impacts on eutrophication and freshwater aquatic ecotoxicity, which are significantly affected by cultivation of crops. Flax and hemp cultivation is associated with emissions to soil and water. For this reason, the composite mixture with flax fibres has a significantly greater impact on eutrophication and freshwater aquatic ecotoxicity than the composite mixture with synthetic fibres. A cementitious composite mixture with sea-grass shows the lowest impacts in all impact categories. The entire life cycle of the studied composites was not included in this research since the life cycle of natural fibre composites is not straightforward and is highly dependent on the durability of the fibres within the matrix.
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STROEVEN, Piet, Martijn STROEVEN, and Jianjun ZHENG. "Structural Simulation of Cementitious Composites(Composite 2)." Proceedings of the Asian Pacific Conference on Fracture and Strength and International Conference on Advanced Technology in Experimental Mechanics 2.01.03 (2001): 611–16. http://dx.doi.org/10.1299/jsmeatemapcfs.2.01.03.0_611.

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Dissertations / Theses on the topic "Cementitious composite"

1

Farooq, Mohammed. "Development of FRP based composite fibre for fibre reinforced cementitious composites." Thesis, University of British Columbia, 2016. http://hdl.handle.net/2429/57668.

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This thesis describes a method of development of a novel fibre based on fibre reinforced polymers (FRP), for use fibre reinforcement in concrete. Thermosetting epoxy resin matrix were reinforced with E-glass, S-glass, and Carbon fibre to produce different types of composite fibres. The FRP panels were produced using the Vacuum Infusion technique, and then cut to different fibre sizes. The volume fractions of reinforcements within the FRP fibre were controlled by using woven and unidirectional fabrics. The number of layers of reinforcing fibres were also changed, to obtain the optimal thickness of the fibres. The FRP material was characterized by means of tensile tests and microscope image analysis. Four different compositions of FRP were produced with tensile strengths ranging from 195 MPa to 950 MPa. The different combinations in geometry broadened the total number of fibres investigated to 12. Single fibre pullout tests were performed to obtain the fundamental fibre-matrix interfacial bond parameters for the different FRP fibres. The FRP fibres, being hydrophilic, along with having a unique rough surface texture, showed a good bond with cement matrix. A bond strength superior to industrially available straight steel fibres and crimped polypropylene fibres has been observed. The 3 best fibres were then chosen to examine the flexural behaviour FRP fibre reinforced concrete beams. The optimized FRP fibres, one each of Glass FRP and Carbon FRP were then further investigated to study the effect of matrix maturity, temperature, fibre inclination, and loading rate on the fibre-matrix interfacial behaviour using single fibre pullout tests. Scanning Electron Microscope (SEM) analysis was carried out to identify the effect of above-mentioned factors on the surface characteristics of the fibre. An attempt was also made to optimize the fibre-matrix interface to achieve an optimized failure mechanism by coating the fibre with oil. The ability of the fibre to transfer stresses across a cracked section over extended periods has been investigated by means of fibre-relaxation tests. Finally, to assess durability, the fibres were conditioned at high pH and high temperature after which single fibre pullout, direct tension tests, & SEM analysis were conducted.
Applied Science, Faculty of
Civil Engineering, Department of
Graduate
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2

Mihai, Iulia. "Micromechanical constitutive models for cementitious composite materials." Thesis, Cardiff University, 2012. http://orca.cf.ac.uk/24624/.

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A micromechanical constitutive model for concrete is proposed in which microcrack initiation, in the interfacial transition zone between aggregate particles and cement matrix, is governed by an exterior-point Eshelby solution. The model assumes a two-phase elastic composite, derived from an Eshelby solution and the Mori-Tanaka homogenization method, to which circular microcracks are added. A multi-component rough crack contact model is employed to simulate normal and shear behaviour of rough microcrack surfaces. It is shown, based on numerical predictions of uniaxial, biaxial and triaxial behaviour that the model captures key characteristics of concrete behaviour. An important aspect of the approach taken in this work is the adherence to a mechanistic modelling philosophy. In this regard the model is distinctly more rigorously mechanistic than its more phenomenological predecessors. Following this philosophy, a new more comprehensive crack-plane model is described which could be applied to crack-planes in the above model. In this model the crack surface is idealised as a series of conical teeth and corresponding recesses of variable height and slope. Based on this geometrical characterization, an effective contact function is derived to relate the contact stresses on the sides of the teeth to the net crack-plane stresses. Plastic embedment and frictional sliding are simulated using a local plasticity model in which the plastic surfaces are expressed in terms of the contact surface function. Numerical simulations of several direct shear tests indicate a good performance of the model. The incorporation of this crack-plane model in the overall constitutive model is the next step in the development of the latter. Computational aspects such as contact related numerical instability and accuracy of spherical integration rules employed in the constitutive model are also discussed. A smoothed contact state function is proposed to remove spurious contact chatter behaviour at a constitutive level. Finally, an initial assessment of the performance of the micromechanical model when implemented in a finite element program is presented. This evaluation clearly demonstrates the capability of the proposed model to simulate the behaviour of plain and reinforced concrete structural elements as well as demonstrating the potential of the micromechanical approach to achieve a robust and comprehensive model for concrete.
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Hazelwood, Tobias. "Investigation of a novel self-healing cementitious composite material system." Thesis, Cardiff University, 2015. http://orca.cf.ac.uk/76766/.

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This thesis describes a portion of the ongoing development of a novel self-healing cementitious material system named LatConX originally proposed by a group of researchers at Cardiff University. The research reported was undertaken with the aim of furthering understanding of the system’s long-term behaviour, ultimately with a view to providing predictions for the performance of the system over a structure’s working life. This aim is accomplished through a combination of experimental and numerical research. An experimental series is presented which investigates the stress relaxation behaviour of polyethylene terephthalate in order to establish how the stress induced by heat-activated restrained shrinkage varies with time. Results of these experiments displayed very little stress reduction from the peak stress, with less than a 5 % loss observed over a 124 day period. The development of a new one dimensional transient thermomechanical model for viscoelastic behaviour of pre-drawn polyethylene terephthalate is then described. This model is shown to be able to reproduce the observed experimental behaviour with good accuracy. The polymer model is coupled with a number of other constitutive models for the behaviour of steel and concrete, thus forming a model for the material system as a whole. This coupling is undertaken within the framework of an idealised simply supported beam with a strong discontinuity for the simulation of a central crack hinge. The model is validated against experimental data and design code predictions. Design considerations for the LatConX system are discussed and modified design equations derived. Parametric studies are presented investigating the structural performance and material costs of beams incorporating the LatConX system compared with that of standard reinforced concrete beams. Encouraging results are reported suggesting that the LatConX system has the potential to simultaneously improve long-term durability and structural performance of reinforced concrete structures and reduce the initial material costs by replacing a percentage of the reinforcing steel with shape memory polymer.
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Wang, J., S. Dong, Ashraf F. Ashour, X. Wang, and B. Han. "Dynamic mechanical properties of cementitious composites with carbon nanotubes." Elsevier, 2019. http://hdl.handle.net/10454/17465.

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Yes
This paper studied the effect of different types of multi-walled carbon nanotubes (MWCNTs) on the dynamic mechanical properties of cementitious composites. Impact compression test was conducted on various specimens to obtain the dynamic stress-strain curves and dynamic compressive strength as well as deformation of cementitious composites. The dynamic impact toughness and impact dissipation energy were, then, estimated. Furthermore, the microscopic morphology of cementitious composites was identified by using the scanning electron microscope to show the reinforcing mechanisms of MWCNTs on cementitious composites. Experimental results show that all types of MWCNTs can increase the dynamic compressive strength and ultimate strain of the composite, but the dynamic peak strain of the composite presents deviations with the MWCNT incorporation. The composite with thick-short MWCNTs has a 100.8% increase in the impact toughness, and the composite with thin-long MWCNTs presents an increased dissipation energy up to 93.8%. MWCNTs with special structure or coating treatment have higher reinforcing effect to strength of the composite against untreated MWCNTs. The modifying mechanisms of MWCNTs on cementitious composite are mainly attributed to their nucleation and bridging effects, which prevent the micro-crack generation and delay the macro-crack propagation through increasing the energy consumption.
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Alaee, Farshid Jandaghi. "Retrofitting of concrete structures using high performance fibre reinforced cementitious composite (HPFRCC)." Thesis, Cardiff University, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.431742.

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Boonsiri, Po. "Monitorina Stress and Strain of structures by using Carbon Fibre-Reinforced Cementitious Composite." Thesis, Imperial College London, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.523739.

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7

Du, Yang. "Durability performance of eco-friendly ductile cementitious composite (EDCC) as a repair material." Thesis, University of British Columbia, 2016. http://hdl.handle.net/2429/58938.

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The objective of the experimental program in this thesis is to investigate the durability performance of Eco-friendly ductile cementitious composite (EDCC), a newly developed repair material for seismic retrofitting. Several aspects of the durability performance of EDCC were investigated in this work, in terms of restrained shrinkage resistance, freeze and thaw resistance and bond strength degradation before and after environmental exposure. All the tests focused on repair overlay and substrate composite assembly. Six different EDCC fiber mixes were involved in the testing to discover the best mix in terms of performance and economical aspects. The substrate of the composite assembly includes concrete, masonry blocks and clay blocks. EDCC can be applied on different substrates by hand casting and spraying. EDCC application on concrete substrates employing the hand casting process is used to explore the durability performance of EDCC. Clay and masonry substrates, along with the spray application process, are only used to compare the influence of different application methods on the bond strength based on the bond strength data obtained in Yuan Yan’s thesis. After the whole experimental program, regarding hand applied process, both 2% PVA and 1% PVA and 1% PET hybrid mix yields to the best durability performance. In spray process, clay substrate specimens give better bond strength than the specimens prepared through hand applied process, however, masonry specimens show lower bond strength than hand applied specimens. Overall 1% PVA and 1% PET will be recommended for future seismic retrofitting application due to lower cost compared to 2% PVA EDCC. It is noted that the performance of EDCC depends greatly on good material mixing for different application processes. In order to obtain a good EDCC mix, a rigorous mixing procedure should be followed. Hence, future in-situ applications should guarantee a proper mixing procedure for good quality control. The spray process was found to be very successful with very little rebound and nearly no material sloughing off. The results of the experiments done in this study indicated that the spray process increases the material application speed to further reduce potential high labor cost.
Applied Science, Faculty of
Civil Engineering, Department of
Graduate
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8

Sultangaliyeva, Fariza. "Formulation of fluid fire-resistant fiber-reinforced cementitious composite : Application to radioactive waste disposal." Thesis, Pau, 2020. http://www.theses.fr/2020PAUU3041.

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Le but de ce travail est de développer un béton fluide résistant au feu renforcé en fibres de polypropylène pour les colis de stockage des déchets radioactifs de moyenne activité à vie longue. Le défi de ce travail consiste à utilizer des fibres de polypropylène qui, même ajoutées en petite quantité, améliorent la résistance au feu mais diminuent de manière significative la maniabilité des bétons frais. Des essais à l’échelle du laboratoire sont effectués afin d’évaluer les comportements rhéologique et à haute température des matériaux cimentaires contenant des fibres de polypropylène. Dans la première partie, une étude du comportement rhéologique des matériaux cimentaires avec des fibres de polypropylène a été réalisée. Le but de cette étude est d’étudier l’influence de ces fibres sur le seuil d’écoulement des pâtes de ciment et des mortiers. Un modèle qui permet d’évaluer la quantité de pâte supplémentaire nécessaire pour compenser l’effet des fibres de polypropylène en fonction de la fluidité du béton frais a été développé.Ensuite, une étude expérimentale et numérique sur le comportement des matériaux cimentaires avec des fibres de polypropylène à haute température a été réalisée afin d’optimiser le choix des fibres pour améliorer la stabilité thermique d’un matériau cimentaire. Des essais de perméabilité résiduelle radiale et des essais feu sur les trois matériaux avec squelettes granulaires différents contenant des fibres de polypropylène de différentes géométries et dosages ont été réalisés dans un but de sélectionner une géométrie et un dosage optimal des fibres. Puis, des simulations thermomécaniques ont été développées à l’échelle macroscopique et mésoscopique. Le choix du diamètre, de la longueur et du dosage des fibres a été fait en fonction de la taille maximale des granulats.Finalement, une méthode de formulation du béton autoplaçant avec des fibres de polypropylène optimisé à la fois du point de vue de la rhéologie et de la résistance au feu a été présentée. Avec cette méthode, la conformité aux critères imposés sur les propriétés à l’état frais et à l’état durci du béton est vérifiée. Des éprouvettes de bétons sont testées sous chargement mécanique uniaxial et, en fonction des résultats, les formulations finales sont sélectionnées pour les futurs essais feu à l’échelle plus importante
The aim of the thesis is to design a self-compacting concrete with polypropylene fibers resistant to fire for a use in storage containers of medium activity long-lived waste. The challenge of the work is presented by the use of polypropylene fibers that enhance fire resistance but drastically diminish workability of concrete even when added at small volume fractions. Tests on laboratory scale are conducted with a purpose of evaluating rheological behavior and high temperature behavior of cementitious materials containing polypropylene fibers.In the first part, a study of rheological behavior of cement-based materials containing polypropylene fibers was done. The aim of this study is to investigate the influence of polypropylene fibers on the yield stress of cement pastes and mortars. A model is proposed to be able to evaluate the quantity of paste necessary to compensate the addition of polypropylene fibres according the fluidity of fresh concrete.Then an experimental and numerical investigation of behavior of cementitious materials with polypropylene fibers at high temperature was done so as to optimize the choice of polypropylene fibers for cementitious material to improve its thermal stability. Three different cementitious materials with three different granular skeleton containing various polypropylene fiber geometries and dosages were tested (residual radial permeability test and fire test) in order to select an optimal fiber geometry and dosage. Then thermomechanical computations was developped at maco and meso scale. Then, a choice of diameter, length and dosage of fibres is proposed according to the maximum size of gravels.Finally, a method of concrete formulation with polypropylene fibers optimized from perspectives of rheology and resistance to fire is presented. In this method, fresh and hardened state properties are verified to ensure an accordance with performance criteria specified by the project. At the end, designed mixes were tested in fire tests conducted on uniaxially compressed prisms and, based on outcomes, final mixes are selected for further fire tests on higher scale concrete
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Ducoulombier, Nicolas. "Anisotropic concrete : 3D priting of concrete reinforced by long fibers, process, characterisation et modelisation." Thesis, Paris Est, 2020. http://www.theses.fr/2020PESC2070.

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Ce travail s’intéresse au renforcement des matériaux cimentaire mis en œuvre par fabrication additive à grande échelle. Ce nouveau procédé permet une complexité géométrique importante, généralement fortement consommatrice de moyens matériels et humains. De plus, il rend théoriquement possible l’industrialisation de la fabrication d’éléments constructifs singuliers, par exemple optimisés par répondre à un chargement mécanique donné. Cependant, il n’existe à l’heure actuelle aucune méthode de renforcement standardisée permettant d’obtenir la résistance en traction et la ductilité nécessaire pour leur utilisation dans les structures des bâtiments. Ce qui limite fortement leur utilisation dans la pratique.Si de nombreuses méthodes sont envisagées dans la littérature pour le renforcement des matériaux cimentaires mis en œuvre par impression 3D, celles-ci sont généralement calquées sur les méthodes traditionnelles du renforcement : bétons fibrés, armatures passives et câble de précontraintes. Ce travail de thèse propose un procédé de renforcement alternatif, breveté au cours de ce travail de thèse, qui tire parti de la spécificité du procédé d’extrusion. De nombreux renforts continus sont en effet insérés dans la filière d’extrusion, appelé ici tête d’impression et entrainé par le débit du matériau cimentaire, ce dernier fournissant la force nécessaire aux déroulements des renforts continus. Le matériau extrudé est alors un composite unidirectionnel à matrice cimentaire renforcé par de nombreuses fibres continues alignées selon la direction du parcours d’impression.Ce travail définit alors le cahier des charges du procédé en termes de propriétés rhéologiques de la matrice cimentaire au moment du dépôt et le type de renfort à privilégier permettant l’obtention d’une bonne adhérence des renforts à la matrice cimentaire, nécessaire au développement d’un renforcement significatif en traction. Le comportement mécanique de l’interface est par ailleurs étudié précisément grâce aux développements d’essais micromécaniques dédiées et l'observation de l’endommagement par microtomographie aux rayons X. Les perspective de ce travail sont la caractérisation et la modélisation multi-échelles du comportement du composite à matrice cimentaire et la proposition de systèmes constructifs innovants
This work focuses on the reinforcement strategies for large scale additive manufacturing of cementitious materials. This new process allows an important geometrical complexity for constructive elements, generally consuming a lot of material and human resources. In addition, it makes it theoretically possible to industrialize the manufacture of singular constructive elements, for example optimized to meet a given mechanical load. However, there is currently no standardized reinforcement method for obtaining the tensile strength and ductility required for their use in building structures. This severely limits their use in practice.While many reinforcement methods are considered in the literature for the 3D-printed cementitious materials, they are a direct transcription of the traditional reinforcement methods such as fibre-reinforced concrete, passive reinforcement and post-tension method. This thesis work proposes an alternative reinforcement process, patented during this thesis work, which takes advantage of the specificity of the extrusion process. Many continuous reinforcements can be inserted before the extrusion die and driven by the flow of the cementitious material, the latter providing the force necessary for the unwinding of each individual continuous reinforcements. The extruded material is then a unidirectional cementitious matrix composite reinforced by many continuous fibers aligned in the direction of the printing path.This work then defines the specifications of the process in terms of rheological properties of the cementitious matrix at the time of deposition and the type of reinforcement to be preferred, allowing good cohesion between the reinforcements and the cementitious matrix necessary for the development of a significant tensile reinforcement. The mechanical behaviour of the interface is also precisely studied thanks to the development of dedicated micromechanical tests and the observation of the damage by X-ray microtomography. The perspectives of this work are the characterization and multi-scale modeling of the behavior of the cementitious matrix composite and the proposal of innovative constructive systems
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Morsy, Mohamed Ibrahim Nasr Verfasser], Harald [Akademischer Betreuer] [Garrecht, and Farouk [Akademischer Betreuer] Heider. "Properties of Rice Straw Cementitious Composite / Mohamed Ibrahim Nasr Morsy. Betreuer: Harald Garrecht ; Farouk Heider." Darmstadt : Universitäts- und Landesbibliothek Darmstadt, 2011. http://d-nb.info/1106113357/34.

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Books on the topic "Cementitious composite"

1

Naaman, Antoine E. Ferrocement and laminated cementitious composites. Ann Arbor, Mich: Techno Press, 2000.

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Sidney, Mindess, ed. Fibre reinforced cementitious composites. London: Elsevier Applied Science, 1990.

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Li, Victor C. Engineered Cementitious Composites (ECC). Berlin, Heidelberg: Springer Berlin Heidelberg, 2019. http://dx.doi.org/10.1007/978-3-662-58438-5.

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Han, Baoguo, Siqi Ding, Jialiang Wang, and Jinping Ou. Nano-Engineered Cementitious Composites. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-7078-6.

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Sidney, Mindess, ed. Fibre reinforced cementitious composites. 2nd ed. London: Taylor & Francis, 2007.

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Shah, S. P. Application of Fracture Mechanics to Cementitious Composites. Dordrecht: Springer Netherlands, 1985.

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Herrmann, Heiko, and Jürgen Schnell, eds. Short Fibre Reinforced Cementitious Composites and Ceramics. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-00868-0.

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Shah, S. P., ed. Application of Fracture Mechanics to Cementitious Composites. Dordrecht: Springer Netherlands, 1985. http://dx.doi.org/10.1007/978-94-009-5121-1.

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P, Shah S., and North Atlantic Treaty Organization. Scientific Affairs Division., eds. Application of fracture mechanics to cementitious composites. Dordrecht, The Netherlands: M. Nijhoff, 1985.

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Bawono, Ali Aryo. Engineered Cementitious Composites for Electrified Roadway in Megacities. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-88542-7.

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Book chapters on the topic "Cementitious composite"

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Jolly, C. K. "The Stiffness and Strength of Small Diameter Steel Fibres in Cementitious Composites." In Composite Structures 3, 254–65. Dordrecht: Springer Netherlands, 1985. http://dx.doi.org/10.1007/978-94-009-4952-2_19.

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Lukasenoks, Arturs, Andrejs Krasnikovs, Arturs Macanovskis, Olga Kononova, and Videvuds Lapsa. "Short Composite Fibres for Concrete Disperse Reinforcement." In Short Fibre Reinforced Cementitious Composites and Ceramics, 85–95. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-00868-0_6.

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Verma, Preeti, Amritpal Kaur, and Jagbir Singh. "Experimental and Numerical Study of Engineered Cementitious Composite." In Lecture Notes in Civil Engineering, 528–36. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-030-02707-0_60.

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Srikakulam, Lakshmi Meghana, and Veerendrakumar C. Khed. "Theoretical Research and Performance of Engineered Cementitious Composite." In Advances in Lightweight Materials and Structures, 253–64. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-7827-4_25.

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Zawawi, Nurmazidah Abdullah, Chai Lian Oh, Siong Wee Lee, Mohd Raizamzamani Md Zain, and Norrul Azmi Yahya. "Mechanical Properties of Engineered Cementitious Composite (ECC): An Overview." In ICSDEMS 2019, 259–64. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-3765-3_26.

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Meng, Dan, C. K. Lee, and Y. X. Zhang. "Flexural Behaviour of Reinforced Polyvinyl Alcohol-Engineered Cementitious Composite Beams." In Strain-Hardening Cement-Based Composites, 441–47. Dordrecht: Springer Netherlands, 2017. http://dx.doi.org/10.1007/978-94-024-1194-2_51.

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Singh, Maninder, Babita Saini, and H. D. Chalak. "An Overview on Waste Materials Used in Engineered Cementitious Composite." In Lecture Notes in Civil Engineering, 213–22. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-5001-0_17.

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Pereira, E. B., G. Fischer, and J. A. O. Barros. "Hybrid Fiber Reinforcement and Crack Formation in Cementitious Composite Materials." In High Performance Fiber Reinforced Cement Composites 6, 535–42. Dordrecht: Springer Netherlands, 2012. http://dx.doi.org/10.1007/978-94-007-2436-5_65.

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Singh, Maninder, Babita Saini, and H. D. Chalak. "Impact of Fiber Hybridization on Performance of Engineered Cementitious Composite." In Lecture Notes in Civil Engineering, 333–41. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-15-9554-7_29.

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Li, V. C., H. C. Wu, and Y. W. Chan. "Interface Property Tailoring for Pseudo Strain-Hardening Cementitious Composites." In Advanced Technology for Design and Fabrication of Composite Materials and Structures, 261–68. Dordrecht: Springer Netherlands, 1995. http://dx.doi.org/10.1007/978-94-015-8563-7_18.

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Conference papers on the topic "Cementitious composite"

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Dry, Carolyn M., and Carrie Warner. "Biomimetic bonelike polymer cementitious composite." In Smart Structures and Materials '97, edited by Wilbur C. Simmons, Ilhan A. Aksay, and Dryver R. Huston. SPIE, 1997. http://dx.doi.org/10.1117/12.267119.

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Brooks, Adam, and Hongyu Zhou. "Developing 3D Printable Lightweight Functional Cementitious Composite." In 17th Biennial International Conference on Engineering, Science, Construction, and Operations in Challenging Environments. Reston, VA: American Society of Civil Engineers, 2021. http://dx.doi.org/10.1061/9780784483381.005.

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Singh, Maninder, Babita Saini, and H. D. Chalak. "Appraisal of Hybrid Fiber Reinforced Engineered Cementitious Composite." In The 4th International Conference on Civil, Structural and Transportation Engineering. Avestia Publishing, 2019. http://dx.doi.org/10.11159/iccste19.192.

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Vavřiník, Tomáš, Jan Zatloukal, Jindřich Fornůsek, and Petr Konvalinka. "Numerical analysis of projectile impact on cementitious composite." In 11TH INTERNATIONAL CONFERENCE OF NUMERICAL ANALYSIS AND APPLIED MATHEMATICS 2013: ICNAAM 2013. AIP, 2013. http://dx.doi.org/10.1063/1.4825675.

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Woon Park, J. "New cementitious composite developments with three dimensional fabric meshes." In 10th International Conference on Fracture Mechanics of Concrete and Concrete Structures. IA-FraMCoS, 2019. http://dx.doi.org/10.21012/fc10.243126.

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Chen, Zhitao, Junxia Li, and Enhua Yang. "High Strength Lightweight Strain-Hardening Cementitious Composite Incorporating Cenosphere." In 9th International Conference on Fracture Mechanics of Concrete and Concrete Structures. IA-FraMCoS, 2016. http://dx.doi.org/10.21012/fc9.130.

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Zhang, Y. X., Khin T. Soe, and L. C. Zhang. "High Velocity Impact Responses Of Engineered Cementitious Composite Panels." In The Seventh International Structural Engineering and Construction Conference. Singapore: Research Publishing Services, 2013. http://dx.doi.org/10.3850/978-981-07-5354-2_m-7-75.

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Jiang, Zhangfan, Osman E. Ozbulut, and Devin K. Harris. "Graphene Nanoplatelets-Based Self-Sensing Cementitious Composites." In ASME 2016 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/smasis2016-9188.

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Over the past two decades, numerous research studies have been conducted to explore behavior of self-sensing cementitious composites with different functional fillers. Most of these studies investigated the use of fillers such as carbon nanofiber (CNF), carbon black, and carbon nanotubes (CNTs) in cement composites to develop a multifunctional material. Since its discovery in 2004, graphene has also raised significant attention as 2D nanoscale reinforcement for composite materials. The planar structure of graphene sheets provides more contact area with the host material. However, high cost and dispersion difficulties are among the drawbacks of graphene. More recently, graphene nanoplatelets (GNPs), which have very thin but wide aspect ratio, are drawing the graphene market due to their advantages such as ease of processing and excellent material properties at a very low cost. The application of two-dimensional graphene nanoplatelets in cementitious composites has yet to gain widespread attention. This paper investigates the self-sensing capabilities of GNP-reinforced hydraulic Portland cement composites. In particular, the effects of GNP content on the electrical properties and piezoresistive characteristics of mortar specimens are explored. In addition, a simple fabrication method that does not require special treating procedures such as ultrasonication and chemical (covalent) treatments for the dispersion of GNPs is pursued. The GNPs used in this study have an average thickness of 8 nanometers and a diameter of 25 microns. Standard prismatic mortar specimens containing different GNP concentrations are prepared using three different mixing procedures. The resistivity of the specimens is measured using a four-point probe method. The piezoresistive response of GNP-reinforced cement composites is evaluated under cyclic compressive loads.
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Ficher, Nadine M., Emanuele Eichholz, Leonardo Stefanello, Ederli Marangon, and Luis E. Kosteski. "STUDY ON MECHANICAL BEHAVIOR OF CEMENTITIOUS COMPOSITES PRODUCED WITH MINERAL ADDITIONS AND REINFORCED WITH JUTE FIBER MESH." In Brazilian Conference on Composite Materials. Pontifícia Universidade Católica do Rio de Janeiro, 2018. http://dx.doi.org/10.21452/bccm4.2018.02.12.

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Yang, Guo, and Zhi-Yuan Li. "Experimental Study on Ultra-lightweight Fire-resistive Engineered Cementitious Composite." In 2nd Annual International Conference on Advanced Material Engineering (AME 2016). Paris, France: Atlantis Press, 2016. http://dx.doi.org/10.2991/ame-16.2016.25.

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Reports on the topic "Cementitious composite"

1

Thornell, Travis, Charles Weiss, Sarah Williams, Jennifer Jefcoat, Zackery McClelland, Todd Rushing, and Robert Moser. Magnetorheological composite materials (MRCMs) for instant and adaptable structural control. Engineer Research and Development Center (U.S.), November 2020. http://dx.doi.org/10.21079/11681/38721.

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Magnetic responsive materials can be used in a variety of applications. For structural applications, the ability to create tunable moduli from relatively soft materials with applied electromagnetic stimuli can be advantageous for light-weight protection. This study investigated magnetorheological composite materials involving carbonyl iron particles (CIP) embedded into two different systems. The first material system was a model cementitious system of CIP and kaolinite clay dispersed in mineral oil. The magnetorheological behaviors were investigated by using parallel plates with an attached magnetic accessory to evaluate deformations up to 1 T. The yield stress of these slurries was measured by using rotational and oscillatory experiments and was found to be controllable based on CIP loading and magnetic field strength with yield stresses ranging from 10 to 104 Pa. The second material system utilized a polystyrene-butadiene rubber solvent-cast films with CIP embedded. The flexible matrix can stiffen and become rigid when an external field is applied. For CIP loadings of 8% and 17% vol %, the storage modulus response for each loading stiffened by 22% and 74%, respectively.
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SHEAR RESISTANCE OF NOVEL PERFORATED SHAPED STEEL-ENGINEERED CEMENTITIOUS COMPOSITE (ECC) CONNECTORS. The Hong Kong Institute of Steel Construction, March 2020. http://dx.doi.org/10.18057/ijasc.2020.16.1.4.

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