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Journal articles on the topic 'Cementitious materials'

Author: Grafiati
Published: 4 June 2021
Last updated: 5 April 2025

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1

Snellings, R., G. Mertens, and J. Elsen. "Supplementary Cementitious Materials." Reviews in Mineralogy and Geochemistry 74, no. 1 (January 1, 2012): 211–78. http://dx.doi.org/10.2138/rmg.2012.74.6.

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2

Lothenbach, Barbara, Karen Scrivener, and R. D. Hooton. "Supplementary cementitious materials." Cement and Concrete Research 41, no. 12 (December 2011): 1244–56. http://dx.doi.org/10.1016/j.cemconres.2010.12.001.

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3

Singh, Nakshatra B., and Shiv S. Das. "Nanoscience of cementitious materials." Emerging Materials Research 1, no. 4 (August 2012): 221–34. http://dx.doi.org/10.1680/emr.11.00022.

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4

Macphee, Donald, and Sidney Diamond. "Thaumasite in Cementitious Materials." Cement and Concrete Composites 25, no. 8 (December 2003): 805–7. http://dx.doi.org/10.1016/s0958-9465(03)00165-3.

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5

Krishnamoorthy, T. S., S. Gopalakrishnan, K. Balasubramanian, B. H. Bharatkumar, and P. Rama Mohan Rao. "Investigations on the cementitious grouts containing supplementary cementitious materials." Cement and Concrete Research 32, no. 9 (September 2002): 1395–405. http://dx.doi.org/10.1016/s0008-8846(02)00799-8.

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6

Wang, Juan, Yaoqun Xu, Xiaopeng Wu, Peng Zhang, and Shaowei Hu. "Advances of graphene- and graphene oxide-modified cementitious materials." Nanotechnology Reviews 9, no. 1 (May 30, 2020): 465–77. http://dx.doi.org/10.1515/ntrev-2020-0041.

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AbstractEmerging nanomaterials provide an invaluable opportunity for the development of cementitious materials. Many scholars have explored the influence of graphene (GP) and graphene oxide (GO) on the performance of the cementitious materials. This article reviews the previous research on the effect of GP and GO on the properties of cementitious materials. Detailed review of the mechanical properties and durability of cementitious materials containing GP or GO nanofilms is presented, and the mechanism is discussed. The mechanical properties of GO-cementitious materials are significantly enhanced. The optimal improvement of GO-modified compressive, flexural, and tensile strengths is 77.3%, 78.3%, and 78.6%, respectively. The durability of GO- and GP-modified cementitious material is compared with the control group. The incorporation of GP or GO significantly improves the sulfate attack resistance, and the transport properties can be decreased, while the frost resistance of GO- and GP-modified cementitious materials needs further research. This literature review shows that the microstructure of GO- and GP-modified cementitious material is improved in three aspects: accelerating the cement hydration, refining the pore structure, and hindering the crack propagation.
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7

Kumar Gupta, Ranjan. "Waste Ceramic Powder as Alternative Concrete - Based Cementitious Materials." International Journal of Science and Research (IJSR) 10, no. 8 (August 27, 2021): 557–61. https://doi.org/10.21275/sr21812180634.

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8

Lu, Cai Rong, Xue Liang Ge, Guo Xing Mei, Wei Bao Liu, Heng Wang, and Yao Li Qian. "Effect of Drought on Dry Shrinkage of Cementitious Materials." Advanced Materials Research 261-263 (May 2011): 606–10. http://dx.doi.org/10.4028/www.scientific.net/amr.261-263.606.

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Shrinkage stress of cementitious materials will generate if the dry shrinkage is restrained in drought condition. Shrinkage stress has influence on crack resistance of cementitious materials. The dry shrinkage of cementitious materials in different relative humidity was studied with Climate Simulation System. The dry shrinkage change law of concrete in 20°C, 60% relative humidity for 500 days and in 20°C, 10% relative humidity for 180 days was compared. The relation between water loss rate and shrinkage rate of cementitious materials in drought condition was analyzed.
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9

Lin, Wei Ting, Yuan Chieh Wu, An Cheng, and Sao Jeng Chao. "Engineering Properties of Fiber Cementitious Materials." Applied Mechanics and Materials 764-765 (May 2015): 42–46. http://dx.doi.org/10.4028/www.scientific.net/amm.764-765.42.

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Fiber cementitious materials are composed of fibers, pozzolan and cementitious. Addition of fibers in cementitious materials may enhance its mechanical properties, particularly tensile strength, and ductility. This project is aimed to evaluate the mechanical properties of fiber cementitious materials which comprise fibers and silica fume in the mixes. Test variables include dosage of silica fume, mix proportions, steel fiber dosage and type. Compressive strength, direct tensile strength and splitting tensile strength of the specimen were obtained through tests. Test results indicate that the splitting tensile strength, direct tensile strength, strain capacity and ability of crack-arresting increase with increasing steel fiber and silica fume dosages. The optimum composite is the mixture with 5 % replacement silica fume and 2 % fiber volume. In addition, the nonlinear regression analysis was used to determine the best-fit relationship between mechanical properties and test parameters.
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10

Baiee, Ameer. "DEVELOPMENT ULTRA-HIGH STRENGTH CEMENTITIOUS CHARACTERISTICS USING SUPPLEMENTARY CEMENTITIOUS MATERIALS." Journal of Engineering Science 28, no. 3 (September 2021): 111–15. http://dx.doi.org/10.52326/jes.utm.2021.28(3).10.

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For sustainability purposes, supplementary cementitious materials (SCMs) are considered essential components for gaining ultra-high strength properties of concrete and mortar. This study experimentally investigates the influence of single, binary, and ternary partial cement replacements of the SCMs on the performance of ultra-high-strength mortar. The investigated SCMs were included ground granulated blast furnace slag (GGBS), densified silica fume (DSF), un-densified silica fume (UDSF), and Fly ash (FA). Three replacements ratios were implemented; 10%, 20%, and 30% in addition to mortar without SCMs to work as a control mix for comparison reasons. 27 mixes were designed to quantify the replacement ratio that explains the best performance, through examining the workability, compressive and tensile strength of each mix. In addition, XRD test was carried out to identify the various decomposition phases of the hardened mortar. The results indicated that binary replacement of 15% GGBS and 15% UDSF exhibited the best performance among all other replacements ratios.
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11

Yazdanbakhsh, Ardavan, Zachary Grasley, Bryan Tyson, and Rashid Abu Al-Rub. "Challenges and Benefits of Utilizing Carbon Nanofilaments in Cementitious Materials." Journal of Nanomaterials 2012 (2012): 1–8. http://dx.doi.org/10.1155/2012/371927.

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Carbon nanofibers/tubes (CNF/Ts) are very strong and stiff and as a result, are expected to be capable of enhancing the mechanical properties of cementitious materials significantly. Yet there are practical issues concerning the utilization of CNF/Ts in cementitious materials. This study summarizes some of the past efforts made by different investigators for utilizing carbon nanofilaments in cementitious materials and also reports recent experimental research performed by the authors on the mechanical properties of CNF-reinforced hardened cement paste. The major difficulties concerning the utilization of CNF/Ts in cementitious materials are introduced and discussed. Most of these difficulties are related to the poor dispersibility of CNF/Ts. However, the findings from the research presented in this work indicate that, despite these difficulties, carbon nanofilaments can significantly improve the mechanical properties of cementitious materials. The results show that CNFs, even when poorly dispersed within the cementitious matrix, can remarkably increase the flexural strength and cracking resistance of concrete subjected to drying conditions.
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12

Huang, Shuai, Yuejun Lyu, and Yanju Peng. "Application Research of New Cementitious Composite Materials in Saline Soil Subgrade Aseismic Strengthening." Advances in Civil Engineering 2020 (January 3, 2020): 1–18. http://dx.doi.org/10.1155/2020/7525692.

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Saline soil affected by earthquakes and groundwater can lead to subgrade subsidence and collapse in highway construction. Consequently, considering the potential activity of the waste slag and magnesia, new cementitious composite materials used in solid saline soil were developed in our study. The unconfined compressive strengths of the saline soil solidified by the new cementitious composite materials with a combination of magnesium oxide, calcium oxide, gypsum, and mineral powder and cement were investigated, and the optimum dosage proportion of the new cementitious composite material for solidifying saline soil was determined; then the SEM, EDS, and XRD of the saline soil solidified by the new cementitious composite materials and cement were analysed. The research result showed that the saline soil solidified by our newly developed cementitious composite material showed compact internal structure and uniformly distributed soil particles; moreover, the new cementitious composite material exhibited a favourable solidifying effect on harmful ions in saline soil, and the Cl− trapping capacity of the new cementitious composite materials was stronger than that of cement. Finally, our developed cementitious composite material was applied to saline soil subgrade strengthening, and the displacement, acceleration, excess pore water pressure, and damage degree of the subgrade strengthening by our newly developed cementitious composite materials decreased remarkably; therefore, our newly developed cementitious composite material can improve the seismic behaviour of the saline soil subgrade and show potential future engineering application value.
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13

Flatt, Robert J., Nicos Martys, and Lennart Bergström. "The Rheology of Cementitious Materials." MRS Bulletin 29, no. 5 (May 2004): 314–18. http://dx.doi.org/10.1557/mrs2004.96.

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AbstractThe introduction of a new generation of dispersants in concrete allow this material to exhibit self-compacting properties in its fresh state and high durability and mechanical strength in its hardened state. These properties translate into many practical advantages for the construction field.Two of the most important are reducing the ecological impact of this sector of industry and reducing the labor-intensive work associated with placing ordinary concrete by vibration. In this article, it will be shown that knowledge of colloidal science has proven essential in the development of this new generation of dispersants for concrete. Indeed, the polymer molecules used in these dispersants are specifically designed to induce steric repulsion between cement particles, reducing their agglomeration and allowing high workability of fresh concrete prior to setting. While the linkage between interparticle forces and the rheological behavior of cement pastes is still only semiquantitative, recent advances in the modeling of concrete rheology show very promising results in terms of handling aggregates with a wide distribution of particle sizes and shapes. However, accurate modeling requires reliable input on the interaction of the dispersant with the hydrating cement at the molecular level, which is identified as a future research challenge.
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14

Simner, Steven, Fanny Coutelot, Hyunshik Chang, and John Seaman. "Technetium Leaching from Cementitious Materials." MRS Advances 2, no. 13 (2017): 717–22. http://dx.doi.org/10.1557/adv.2017.35.

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ABSTRACTAt the Savannah River Site (SRS) low activity salt solution is stabilized via encapsulation within a grout termed saltstone. Saltstone is emplaced into large (multi-million gallon) concrete storage facilities referred to as Saltstone Disposal Units (SDUs). Technetium-99 (99Tc) is a long-lived radionuclide contained in the low activity salt waste and subsequently incorporated into the grout waste form: it is considered a significant contributor to risk with respect to the long-term radiation exposure of the environment surrounding the SDUs. In the reducing, high pH environment within the grout,99Tc is expected to be relatively immobile since it exists in a reduced Tc(IV) oxidation state in the form of sparingly soluble sulfides (TcSx) or hydrated oxides (TcO2.xH2O). However, in the presence of O2(associated with the future infiltration of air or oxygenated ground waters into the saltstone monolith) it is possible for redox-sensitive Tc(IV) to transition into highly soluble (and mobile) Tc(VII) species, pertechnetate (TcO4-), which is more readily transported to the surrounding environment. Traditional approaches to quantifying the leaching behavior of99Tc from cementitious matrices have involved partitioning experiments using size-reduced (crushed/ground) saltstone samples, and determination of the99Tc fraction immobilized by the cementitious solids. Such experiments create artificially high solid-solution contact areas that likely result in higher99Tc leachate concentrations than would be expected for intact, monolithic samples. In the current study a new technique, termed the Dynamic Leaching Method (DLM), is being used to investigate the99Tc leaching behavior of monolithic saltstone samples. The data derived using this technique is intended to inform the SRS Saltstone Disposal Facility (SDF) Performance Assessment (PA) which models the long-term transport of radionuclides from the SDUs to the environment. The DLM utilizes a flexible-wall permeameter to achieve saturated leaching under an elevated hydraulic gradient in an effort to simulate the transport of groundwater through saltstone. Initial findings indicate that the99Tc concentrations in the leachate are on the order of 1E-08 mol/L which suggests that the saltstone leaching behavior is controlled by the solubility of TcO2.xH2O compounds.
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15

Leung, Chin K., and Zachary C. Grasley. "Poromechanical Damping of Cementitious Materials." Journal of Materials in Civil Engineering 24, no. 2 (February 2012): 232–38. http://dx.doi.org/10.1061/(asce)mt.1943-5533.0000368.

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16

Wieland, Erich, Jan Tits, Dominik Kunz, and Rainer Dähn. "Strontium Uptake by Cementitious Materials." Environmental Science & Technology 42, no. 2 (January 2008): 403–9. http://dx.doi.org/10.1021/es071227y.

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17

Igarashi, S., A. Bentur, and S. Mindess. "Microhardness testing of cementitious materials." Advanced Cement Based Materials 4, no. 2 (September 1996): 48–57. http://dx.doi.org/10.1016/s1065-7355(96)90051-6.

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18

Zhang, Zhidong, and George W. Scherer. "Supercritical drying of cementitious materials." Cement and Concrete Research 99 (September 2017): 137–54. http://dx.doi.org/10.1016/j.cemconres.2017.05.005.

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19

Sugiyama, Daisuke, Tomonari Fujita, Taiji Chida, and Masaki Tsukamoto. "Alteration of fractured cementitious materials." Cement and Concrete Research 37, no. 8 (August 2007): 1257–64. http://dx.doi.org/10.1016/j.cemconres.2007.05.003.

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20

Tamás, Ferenc, and György L. Balázs. "Fracture mechanics of cementitious materials." Cement and Concrete Research 27, no. 5 (May 1997): 797–98. http://dx.doi.org/10.1016/s0008-8846(97)00021-5.

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21

Rong, Hui, and ChunXiang Qian. "Characterization of microbe cementitious materials." Chinese Science Bulletin 57, no. 11 (April 2012): 1333–38. http://dx.doi.org/10.1007/s11434-012-5047-9.

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22

Mindess, S. "Fracture mechanics of cementitious materials." Canadian Journal of Civil Engineering 23, no. 5 (October 1, 1996): 1138. http://dx.doi.org/10.1139/l96-922.

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23

Carriço, Ana, José Alexandre Bogas, and Mafalda Guedes. "Thermoactivated cementitious materials – A review." Construction and Building Materials 250 (July 2020): 118873. http://dx.doi.org/10.1016/j.conbuildmat.2020.118873.

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24

Stroeven, P., and J. Hu. "Gradient structures in cementitious materials." Cement and Concrete Composites 29, no. 4 (April 2007): 313–23. http://dx.doi.org/10.1016/j.cemconcomp.2006.10.002.

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25

Zajac, Maciej, Ippei Maruyama, Atsushi Iizuka, and Jørgen Skibsted. "Enforced carbonation of cementitious materials." Cement and Concrete Research 174 (December 2023): 107285. http://dx.doi.org/10.1016/j.cemconres.2023.107285.

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26

Dong, Yun, Kai Tao Xiao, and Hua Quan Yang. "Influence of Limestone Powder on the Performance of Cementitious Materials." Applied Mechanics and Materials 541-542 (March 2014): 123–29. http://dx.doi.org/10.4028/www.scientific.net/amm.541-542.123.

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This paper study on the mortar strength, particle gradation and mortar fluidity of binary and ternary systems for cementitious materials with limestone powder or fly ash, analyze the influence of limestone powders with different specific surface areas and contents on the performance of cementitious materials; and research the performance of limestone powder in cementitious materials by means of micro analysis. The result shows that the limestone powder can not only work as the filling material, but also speed up the early hydration of cement in the cementitious material system.
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27

Han, Baoguo, Yunyang Wang, Siqi Ding, Xun Yu, Liqing Zhang, Zhen Li, and Jinping Ou. "Self-sensing cementitious composites incorporated with botryoid hybrid nano-carbon materials for smart infrastructures." Journal of Intelligent Material Systems and Structures 28, no. 6 (July 28, 2016): 699–727. http://dx.doi.org/10.1177/1045389x16657416.

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The botryoid hybrid nano-carbon materials were incorporated into cementitious materials to develop a new type of self-sensing cementitious composites, and then the mechanical, electrically conductive, and piezoresistive behaviors of the developed self-sensing cementitious composites with botryoid hybrid nano-carbon materials were comprehensively investigated. Moreover, the modification mechanisms of botryoid hybrid nano-carbon materials to cementitious materials were also explored. The experimental results show that the compressive strength and the elasticity modulus of the self-sensing cementitious composites botryoid hybrid nano-carbon materials decrease with the increase in the botryoid hybrid nano-carbon material content, while the Poisson’s ratio does the opposite. The percolation threshold zone of the self-sensing cementitious composites botryoid hybrid nano-carbon materials is from 2.28 to 3.85 vol.%. The optimal content of botryoid hybrid nano-carbon materials is 3.38 vol.% for piezoresistivity of the self-sensing cementitious composites botryoid hybrid nano-carbon materials. The amplitude of fractional change in resistivity goes up to 70.4% and 28.9%, respectively, under the monotonic compressive loading to failure and under the repeated compressive loading within elastic regime. The piezoresistive stress/strain sensitivity reaches (3.04%/MPa)/354.28 within elastic regime. The effective modification of botryoid hybrid nano-carbon materials to electrically conductive and piezoresistive properties of cementitious materials at such low content is attributed to their botryoid structures, which are beneficial for the dispersion of botryoid hybrid nano-carbon materials and the formation of conductive network in cementitious materials. The use of botryoid hybrid nano-carbon materials provides a new bottom–up design and fabrication approach for nano-engineering multifunctional cementitious composites.
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28

Wang, Xiao Ying, Ming Zhang Lan, Wei Fang Hou, Bin Feng Xiang, and Xu Dong Zhao. "Influence of Triethanolamine on the Properties of Cement-Based Materials." Materials Science Forum 898 (June 2017): 2010–17. http://dx.doi.org/10.4028/www.scientific.net/msf.898.2010.

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The effects of triethanolamine on the compressive strength and setting time of fly ash cementitious materials, slag cementitious materials, and limestone cementitious materials were investigated. The results show that the dosage of 0.04% of triethanolamine can significantly improve the 3d, 7d and 28d compressive strength of fly ash cementitious materials. It possesses less impact on the setting time. The dosage of 0.04% of triethanolamine can significantly improve the 3d and 7d compressive strength of slag cementitious materials while the effect of late strength is not obvious. It extends the initial setting time and the final setting time is not changed, which has retarding effect. The results of hydration heat and XRD show that triethanolamine extends the induction period of cement hydration, and gypsum is exhausted in advance during the hydration process. Triethanolamine promotes the transformation of AFt to AFm and there is no effect on the type of hydration products.
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29

Kong, Fansheng, Fang Xu, Qiuyang Xiong, Songji Xu, Xiang Li, Wenxiang Fu, and Zhijiong Guo. "Experimental Research on Properties of UHPC Based on Composite Cementitious Materials System." Coatings 12, no. 8 (August 20, 2022): 1219. http://dx.doi.org/10.3390/coatings12081219.

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As concrete damage occurs frequently in the transition zone of bridge expansion joints, this paper discussed ultra-high-performance concrete (UHPC) based on composite cementitious materials system for the repair of the bridge expansion joint transition zone. The performance of UHPC based on composite cementitious materials system was studied by combining the macroscopic properties and microstructure of the material with the hydration mechanism of the cementitious material. The influence of sulphate aluminum cement (SAC) on composite cementitious materials system was studied. The experimental results showed that the appropriate amount of SAC can effectively reduce the setting time in the composite cementitious materials system. While SAC caused the strength to decrease, it has little effect on the mechanical properties of the composite cementitious materials system. When the ratio of SAC is 0.1 in the composite cementitious materials system, the setting time is shortened with maintaining the dense micro-structure observed by the SEM images. It can achieve fast hardening and have good early mechanical performance while retaining excellent long-term properties. Therefore, the addition of SAC can effectively make it possible to apply the excellent performance of UHPC for the repair of highway and bridge.
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30

Suraneni, Prannoy, Vahid Jafari Azad, Burkan O. Isgor, and William Jason Weiss. "Calcium oxychloride formation in pastes containing supplementary cementitious materials: Thoughts on the role of cement and supplementary cementitious materials reactivity." RILEM Technical Letters 1 (May 29, 2016): 24. http://dx.doi.org/10.21809/rilemtechlett.2016.7.

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Over the last decade many concrete pavements in North America have begun to show excessive damage at the joints. This damage appears to be due to two primary causes: classic freeze-thaw damage due to local saturation caused by the pooling of water at the joints, and formation of an expansive phase known as calcium oxychloride due to a reaction between chloride-based deicing salts and calcium hydroxide in concrete. This letter explores the formation of calcium oxychloride in cementitious matrices based on constituent materials and mixture compositions. Low temperature differential scanning calorimetry and thermogravimetric analysis were used to quantify the amount of calcium oxychloride and calcium hydroxide, respectively. Thermodynamic modeling was used to predict calcium hydroxide contents from the constituent material compositions. It is shown that calcium oxychloride contents are well correlated with calcium hydroxide contents in cementitious pastes. Supplementary cementitious materials, such as fly ash and slag, can reduce calcium oxychloride formation by reducing the amount of calcium hydroxide. Complexities in the determination of reactivity of supplementary cementitious materials based on their replacement level and different water-to-cement ratios are discussed. Although it is clear that supplementary cementitious materials are beneficial in reducing calcium oxychloride formation, additional analysis tools are needed to more accurately quantify the specific mechanisms (such as dilution, pozzolanic or hydraulic reaction, changes in cement hydration) that result in the beneficial aspects of each supplementary cementitious material.
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31

Suraneni, Prannoy, Vahid Jafari Azad, Burkan O. Isgor, and William Jason Weiss. "Calcium oxychloride formation in pastes containing supplementary cementitious materials: Thoughts on the role of cement and supplementary cementitious materials reactivity." RILEM Technical Letters 1 (May 29, 2016): 24. http://dx.doi.org/10.21809/rilemtechlett.v1.7.

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Over the last decade many concrete pavements in North America have begun to show excessive damage at the joints. This damage appears to be due to two primary causes: classic freeze-thaw damage due to local saturation caused by the pooling of water at the joints, and formation of an expansive phase known as calcium oxychloride due to a reaction between chloride-based deicing salts and calcium hydroxide in concrete. This letter explores the formation of calcium oxychloride in cementitious matrices based on constituent materials and mixture compositions. Low temperature differential scanning calorimetry and thermogravimetric analysis were used to quantify the amount of calcium oxychloride and calcium hydroxide, respectively. Thermodynamic modeling was used to predict calcium hydroxide contents from the constituent material compositions. It is shown that calcium oxychloride contents are well correlated with calcium hydroxide contents in cementitious pastes. Supplementary cementitious materials, such as fly ash and slag, can reduce calcium oxychloride formation by reducing the amount of calcium hydroxide. Complexities in the determination of reactivity of supplementary cementitious materials based on their replacement level and different water-to-cement ratios are discussed. Although it is clear that supplementary cementitious materials are beneficial in reducing calcium oxychloride formation, additional analysis tools are needed to more accurately quantify the specific mechanisms (such as dilution, pozzolanic or hydraulic reaction, changes in cement hydration) that result in the beneficial aspects of each supplementary cementitious material.
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32

Chen, Qin Wen, and Chun Xiang Qian. "A Novel Approach to Characterize the Quantity and Distribution of Microorganisms in Microbial Self-Healing Cementitious Materials." Key Engineering Materials 871 (January 2021): 386–91. http://dx.doi.org/10.4028/www.scientific.net/kem.871.386.

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Microorganisms can effectively heal the cracks of cementitious materials through the formation of calcium carbonate by microbial mineralization deposition, which has a wide application prospect in cementitious materials. In order to analysis the activity change and distribution of microorganisms in cementitious materials, this paper prepared cement pastes incorporated microbial powder, and extracted microorganisms by pre-crushing, grinding and ultrasonic, at the age of 3, 7 and 28 days respectively. The relationship between the optical density and effector cells is near linear fit, reflecting the activity change and specific distribution of microorganisms in cement paste specimen of different ages. The in-depth research on the activity change and distribution of microorganisms in the microbial cementitious materials can effectively characterize the microorganisms in the cementitious materials, which has a guiding role in microbial self-healing cementitious materials.
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33

Yang, Hua Shan, Kun He Fang, and Sheng Jin Tu. "Pozzolanic Reaction of Supplementary Cementitious Materials and Its Effects on the Strength of Mass Concrete." Advanced Materials Research 168-170 (December 2010): 505–11. http://dx.doi.org/10.4028/www.scientific.net/amr.168-170.505.

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The present study aims to investigate the opportunity to largely substitute low heat Portland cement of mass concrete with supplementary cementitious materials. The pozzolanic reaction of two types of supplementary cementitious materials, phosphorous slag powder and fly ash , were determined by X-ray diffraction, differential thermal analysis–thermogravimetry and scanning electron microscopy from 28 to 90 days. The properties of mortar and mass concrete containing 30% of supplementary cementitious materials were also investigated. Results showed that supplementary cementitious materials could decrease the amount of calcium hydroxide, fill the capillary pores, thus making the mortar and mass concrete more compact and durable. Long-term strength of mass concrete containing 30% of supplementary cementitious materials were comparable (or even better) than the control concrete (without supplementary cementitious materials) at constant workability, while the Young’s modulus was lower than the control concrete.
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34

Lv, Z., and D. Chen. "Overview of recent work on self-healing in cementitious materials." Materiales de Construcción 64, no. 316 (October 14, 2014): e034. http://dx.doi.org/10.3989/mc.2014.05313.

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35

Sahmaran, Mustafa, Gurkan Yildirim, and Tahir K. Erdem. "Self-healing capability of cementitious composites incorporating different supplementary cementitious materials." Cement and Concrete Composites 35, no. 1 (January 2013): 89–101. http://dx.doi.org/10.1016/j.cemconcomp.2012.08.013.

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36

Neithalath, Narayanan, and Gaurav Sant. "Advances in characterization and modeling of cementitious materials: transport and volume change in cementitious materials." International Journal of Advances in Engineering Sciences and Applied Mathematics 9, no. 2 (June 2017): 52–53. http://dx.doi.org/10.1007/s12572-017-0192-7.

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37

Wang, Junjie, Jianhe Xie, and Yongliang Liu. "Sustainable Cementitious Materials for Civil and Transportation Engineering." Materials 16, no. 18 (September 19, 2023): 6290. http://dx.doi.org/10.3390/ma16186290.

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The current Special Issue entitled “Sustainable Cementitious Materials for Civil and Transportation Engineering” aims to discuss current research on the preparation, characterization, and application of sustainable cementitious materials for civil and transportation engineering, with a special focus on the development of low-carbon construction materials [...]
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38

Guo, Aofei, Zhihui Sun, Noppadon Sathitsuksanoh, and Hu Feng. "A Review on the Application of Nanocellulose in Cementitious Materials." Nanomaterials 10, no. 12 (December 10, 2020): 2476. http://dx.doi.org/10.3390/nano10122476.

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The development of the concrete industry is always accompanied by some environmental issues such as global warming and energy consumption. Under this circumstance, the application of nanocellulose in cementitious materials is attracting more and more attention in recent years not only because of its renewability and sustainability but also because of its unique properties. To trace the research progress and provide some guidance for future research, the application of nanocellulose to cementitious materials is reviewed. Specifically, the effects of cellulose nanocrystal (CNC), cellulose nanofibril (CNF), bacterial cellulose (BC), and cellulose filament (CF) on the physical and fresh properties, hydration, mechanical properties, microstructure, rheology, shrinkage, and durability of cementitious materials are summarized. It can be seen that the type, dosage, and dispersion of nanocellulose, and even the cementitious matrix type can lead to different results. Moreover, in this review, some unexplored topics are highlighted and remain to be further studied. Lastly, the major challenge of nanocellulose dispersion, related to the effectiveness of nanocellulose in cementitious materials, is examined in detail.
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39

Xu, Zhiyuan, and Guang Ye. "Understanding Chloride Diffusion Coefficient in Cementitious Materials." Materials 16, no. 9 (April 29, 2023): 3464. http://dx.doi.org/10.3390/ma16093464.

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One of the key problems that affect the durability of reinforced concrete structures is the corrosion of rebar induced by chloride. Despite the complicated transport mechanism of chloride ions in cementitious materials, diffusion is still the key mechanism of chloride ingress. The determination of the chloride diffusion coefficient will help to predict the chloride profile inside the cementitious materials and estimate the service life with regard to chloride-induced corrosion. However, this paper shows that the chloride diffusion coefficient in the literature is sometimes misunderstood. Such a misunderstanding results in the overestimation of the chloride resistance of cementitious materials. To clarify the chloride diffusion coefficient, this paper first presents the steady- and non-steady-state diffusion equations in cementitious materials. The factors that influence the diffusive flux are identified. The effective and apparent diffusion coefficients are then clearly explained and properly defined. We also point out the obscure definitions of the effective diffusion coefficient in the literature. The varied definitions of the effective diffusion coefficient are the result of the consideration of different factors affecting the diffusion process. Subsequently, this paper discusses two natural diffusion test methods that are frequently employed in cementitious materials to measure the chloride diffusion coefficient. The influencing factors considered by the measured diffusion coefficients are analyzed in detail. Then, the diffusion coefficients determined in some of the studies are reviewed. It is shown that three typical errors could occur when numerically determining the diffusion coefficients.
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40

Wang, Qing, Ying Wang, Xiaowei Gu, Jianping Liu, and Xiaochuan Xu. "Study on the Properties and Hydration Mechanism of Calcium Carbide Residue-Based Low-Carbon Cementitious Materials." Buildings 14, no. 5 (April 30, 2024): 1259. http://dx.doi.org/10.3390/buildings14051259.

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Alkali-activated cementitious materials, as an environmentally friendly cementitious material, can effectively reduce carbon emissions and improve the utilisation of solid wastes. However, traditional strong alkali activators have limitations such as high carbon emissions and poor safety. In order to overcome the defects of traditional strong alkaline activators and realise the high value-added use of calcium carbide residue (CCR), this paper adopts CCR as an alkaline activator to activate granulated blast furnace slag (GBFS)-steel slag (SS) cementitious systems for the preparation of alkaline-activated cementitious materials. The effects of CCR content and SS content on the compressive strength and working performance of CCR-GBFS-SS cementitious systems are analysed, along with the hydration process of CCR-GBFS-SS cementitious systems and the mechanism of action through the hydration products, their chemical structure and their microscopic morphology. The research results show that CCR-GBFS-SS cementitious systems have a 28-day compressive strength of 41.5 MPa and they can be controlled by the setting time; however, the flow performance is poor. The SS content can be increased to improve the flow performance; however, this will reduce the compressive strength. In CCR-GBFS-SS cementitious systems, CCR is the main driving force of hydration reactions, GBFS mainly provides active silica and aluminium and the amorphous C-(A)-S-H gel and ettringite formed by the synergistic action of multiple solid wastes are the main sources of compressive strength. With the extension of the curing time, the amount of hydration products in the cementitious systems gradually increases and the matrix of the cementitious systems gradually becomes denser. This study will provide a reference for the consumption of low-value solid waste such as CCR and the preparation of low-carbon cementitious materials from multi-component solid wastes.
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41

Zhang, Pengfei, Fan Kong, and Lu Hai. "Strength Prediction of Smart Cementitious Materials Using a Neural Network Optimized by Particle Swarm Algorithm." Buildings 14, no. 7 (July 3, 2024): 2033. http://dx.doi.org/10.3390/buildings14072033.

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Because of the improved physical, mechanical and crack–resistant properties, smart cementitious materials have garnered significant attention in civil engineering. However, the method of predicting performance of smart cementitious materials remains a formidable task. To address this issue, this study develops a neural network optimized by particle swarm algorithm, specifically designed for predicting the strength of smart cementitious materials. Particle swarm optimization is used to determine the initial weights and biases of the neural network in this algorithm. Two types of smart cementitious materials, namely 3D printed fiber reinforced concrete and graphene nanoparticles–reinforced cementitious composites, are studied as examples. Utilizing the PSO–BPNN method and data gathered from the existing articles, the predictive models for the mechanical properties of these materials are developed. Five commonly used statistical metrics are applied to evaluate the predictive performance. The results indicate suggest the PSO–BPNN outperforms the traditional back propagation neural network. Thus, a reliable and robust performance predictive model can be built for smart cementitious materials using the proposed approach.
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42

Zhang, Huiqin, Ping Ji, and Si Wu. "Study on the performance of gravel stabilization by red mud-based cementitious materials." Vibroengineering Procedia 52 (November 25, 2023): 94–100. http://dx.doi.org/10.21595/vp.2023.23632.

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In this paper, red mud and slag were used as the main cementitious materials, and desulfurization gypsum and exciter materials were mixed to prepare red mud-based cementitious materials with excellent performance. The mechanical properties of red mud-based cementitious material stabilized gravel material were investigated by carrying out the compaction test, unconfined compressive strength test, splitting strength test and fatigue performance test. The test results show that with the increase in the dose of cementitious material, the hydration is more significant, generating more hydrated calcium silicate (C-S-H) gel, which in turn makes the unconfined compressive strength and splitting strength increase to a certain extent. Adding exciter and desulfurization gypsum in the appropriate amount is conducive to improving the hydration of red mud, improving the structural compactness, and improving the mechanical properties, volumetric stability and seepage resistance of the cementitious material.
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43

Ramanathan, Sivakumar, Priyadarshini Perumal, Mirja Illikainen, and Prannoy Suraneni. "Mechanically activated mine tailings for use as supplementary cementitious materials." RILEM Technical Letters 6 (July 16, 2021): 61–69. http://dx.doi.org/10.21809/rilemtechlett.2021.143.

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Two mine tailings are evaluated for their potential as supplementary cementitious materials. The mine tailings were milled using two different methods – ball milling for 30 minutes and disc milling for durations ranging from 1 to 15 minutes. The modified R3 test was carried out on the mine tailings to quantify their reactivity. The reactivity of the disc milled tailings is greater than those of the ball milled tailings. Strong correlations are obtained between milling duration, median particle size, amorphous content, dissolved aluminum and silicon, and reactivity of the mine tailings. The milling energy results in an increase in the fineness and the amorphous content, which do not appreciably increase beyond a disc milling duration of 8 minutes. The reactivity increases significantly beyond a certain threshold fineness and amorphous content. Cementitious pastes were prepared at 30% supplementary cementitious materials replacement level at a water-to-cementitious materials ratio of 0.40. No negative effects of the mine tailings were observed at early ages in cement pastes based on isothermal calorimetry and thermogravimetric analysis, demonstrating the potential for these materials to be used as supplementary cementitious materials.
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44

Snoeck, Didier. "Superabsorbent polymers to seal and heal cracks in cementitious materials." RILEM Technical Letters 3 (November 15, 2018): 32–38. http://dx.doi.org/10.21809/rilemtechlett.2018.64.

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Superabsorbent polymers (SAPs) are promising admixtures to improve properties in cementitious materials. Not only useful to mitigate autogenous shrinkage and to increase the freeze-thaw resistance, SAP particles may enhance self-sealing and self-healing in cementitious materials. The self-sealing leads to a regain in water tightness and promoted autogenous healing may prove to be useful to limit repair works caused by concrete cracking. By providing sufficient building blocks for healing, limiting the crack width by means of synthetic microfibers and inducing water by means of SAPs, a smart cementitious material is obtained. This material can be an excellent material to use in future building applications such as tunnel works and ground-retaining structures. This paper gives an overview of the current status of the research on SAPs in cementitious materials to obtain sealing and healing.
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45

Kumar, N. Manoj, Vasala Madhava Rao, and Mantripragada Anjan Kumar. "SUSTAINABLE POLYMER-BASED CONCRETE WITH SYNTHETIC FIBER ENHANCEMENT." International Journal of Innovations & Research Analysis 04, no. 03(I) (September 30, 2024): 148–52. http://dx.doi.org/10.62823/ijira/4.3(i).6893.

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Concrete has played a vital role in the housing industry over the past few decades, being utilized in a wide range of constructions, from small buildings to large infrastructural dams and reservoirs. A binding agent is a major component of cementitious material. The value of cement is rising daily due to its limited availability and high demand. Simultaneously, global warming is escalating with each passing day. The production of cement also results in the release of greenhouse gases. An investigation has been initiated focusing on cementitious materials, including a trial-based study examining the use of fly ash and GGBS as substitutes for cement. This approach aims to reduce cement consumption and minimize greenhouse gas emissions. An investigation has been initiated focusing on geopolymer cementitious material incorporating nylon crystals. Furthermore, a comparative analysis of this pbc with conventional M20 cementitious material is warranted. Experimental studies were conducted on plain geopolymer cementitious material, and the substitution of cement with Nylon crystal has been completed. In this study, the cementitious materials were prepared by incorporating fly ash, glass, hydroxide, and nylon crystal, with proportions ranging from 100% to 40% by weight of fly ash added to the mixes. A comparative analysis has been conducted between M20 cementitious material and Nylon crystal reinforced geopolymer cementitious material, focusing on their compressive strength, split tensile strength, and bending resistance characteristics. The geopolymer cementitious material developed with Nylon crystal exhibited superior performance in compressive strength, split tension strength, and bending resistance, demonstrating enhanced results at seven, 28, 60, and 90 days compared to conventional cementitious materials. Furthermore, two distinct types of acid attacks are conducted to evaluate the bond strength and compressive strength of both standard cementitious materials and nylon crystal reinforced geopolymer cementitious materials.
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46

Huang, Chien-Yu, Yu-Chien Lin, Johnson H. Y. Chung, Hsien-Yi Chiu, Nai-Lun Yeh, Shing-Jyh Chang, Chia-Hao Chan, Chuan-Chi Shih, and Guan-Yu Chen. "Enhancing Cementitious Composites with Functionalized Graphene Oxide-Based Materials: Surface Chemistry and Mechanisms." International Journal of Molecular Sciences 24, no. 13 (June 21, 2023): 10461. http://dx.doi.org/10.3390/ijms241310461.

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Graphene oxide-based materials (GOBMs) have been widely explored as nano-reinforcements in cementitious composites due to their unique properties. Oxygen-containing functional groups in GOBMs are crucial for enhancing the microstructure of cementitious composites. A better comprehension of their surface chemistry and mechanisms is required to advance the potential applications in cementitious composites of functionalized GOBMs. However, the mechanism by which the oxygen-containing functional groups enhance the response of cementitious composites is still unclear, and controlling the surface chemistry of GOBMs is currently constrained. This review aims to investigate the reactions and mechanisms for functionalized GOBMs as additives incorporated in cement composites. A variety of GOBMs, including graphene oxide (GO), hydroxylated graphene (HO-G), edge-carboxylated graphene (ECG), edge-oxidized graphene oxide (EOGO), reduced graphene oxide (rGO), and GO/silane composite, are discussed with regard to their oxygen functional groups and interactions with the cement microstructure. This review provides insight into the potential benefits of using GOBMs as nano-reinforcements in cementitious composites. A better understanding of the surface chemistry and mechanisms of GOBMs will enable the development of more effective functionalization strategies and open up new possibilities for the design of high-performance cementitious composites.
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47

Obla, Karthik H., Rongjin Hong, Colin L. Lobo, and Haejin Kim. "Should Minimum Cementitious Contents for Concrete Be Specified?" Transportation Research Record: Journal of the Transportation Research Board 2629, no. 1 (January 2017): 1–8. http://dx.doi.org/10.3141/2629-01.

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Minimum cementitious contents are commonly specified in project specifications. The primary focus of this study was to examine the influence of the cementitious content on concrete performance at specific water-to-cementitious materials ratios. The experimental variables included water-to-cementitious materials ratios ranging from 0.40 to 0.55, mixtures containing portland cement only, and mixtures containing 40% slag cement or 25% fly ash. Concrete performance was evaluated through laboratory tests on workability, strength, and durability. The results showed that at a given water-to-cementitious ratio a higher cementitious content results in higher paste volumes and poorer concrete performance. On the basis of these results the value of maintaining minimum cementitious content requirements in project specifications is questioned.
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48

Liu, Shuhua, Qiaoling Li, and Xinyi Zhao. "Hydration Kinetics of Composite Cementitious Materials Containing Copper Tailing Powder and Graphene Oxide." Materials 11, no. 12 (December 8, 2018): 2499. http://dx.doi.org/10.3390/ma11122499.

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The hydration heat evolution curves of composite cementitious materials containing copper tailing powder (CT) and graphene oxide (GO) with different contents are measured and analyzed in this paper. The hydration rate and total hydration heat of the composite cementitious materials decrease with the increase of CT dosage, but improve with the increase of CT fineness and GO dosage. The hydration process of the cementitious systems undergoes three periods, namely nucleation and crystal growth (NG), phase boundary reaction (I), and diffusion (D), which can be simulated well using the Krstulovic–Dabic model. The hydration rates of the three controlling processes of the composite cementitious system decrease with the increase of CT content, but improve slightly with the increase of CT fineness. GO enhances the controlling effect of the NG process of the cementitious systems with or without CT, thus promotes the early hydration as a whole.
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49

Rong, Hui, Chun Xiang Qian, and Long Zhi Li. "Influence of Magnesium Additive on Mechanical Properties of Microbe Cementitious Materials." Materials Science Forum 743-744 (January 2013): 275–79. http://dx.doi.org/10.4028/www.scientific.net/msf.743-744.275.

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Microbe cement is a new generation cement due to the ever increasing awareness of environmental protection. Microbe cement is a new strengthening material based on microbiologically induced precipitation of calcium carbonate. This paper presents the results from laboratory research on the influence of magnesium additive concentration (1.0mol/L3.0mol/L5.0mol/L and 7.0 mol/L) on the mechanical properties of microbe cementitious materials. In addition, the micro-morphology and microstructure of microbe cementitious materials were analyzed by scanning electron microscopy (SEM). The experimental results indicate that when the magnesium additive concentration was 1.0 mol/L, the compressive strength of microbe cementitious materials can reach up to 6.2MPa at an age of 12 days. The microstructure of microbe cementitious materials depends on the content of mineral produced by microbially induced precipitation.
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50

Guo, Huijuan, Peihan Wang, Qiuyi Li, Guoying Liu, Qichang Fan, Gongbing Yue, Shuo Song, Shidong Zheng, Liang Wang, and Yuanxin Guo. "Properties of Light Cementitious Composite Materials with Waste Wood Chips." Materials 15, no. 23 (December 5, 2022): 8669. http://dx.doi.org/10.3390/ma15238669.

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The CO2 emissions from the cement industry and the production of waste wood chips are increasing with the rapid growth of the construction industry. In order to develop a green environmental protection building material with low thermal conductivity and up to standard mechanical properties, in this study, pine waste wood chips were mixed into cement-based materials as fine aggregate, and three different kinds of cementitious binders were used, including sulfur aluminate cement (SAC), ordinary Portland cement (OPC), and granulated blast furnace slag (GBFS), to prepare a recycled light cementitious composite material. The mechanical, thermal conductivity, shrinkage, water absorption, and pore structure of a wood chip light cementitious composite material were studied by changing the Ch/B (the mass ratio of wood chip to binder). The results showed that the strength, dry density, and thermal conductivity of the specimens decreased significantly with the increase in the Ch/B, while the shrinkage, water absorption, and pore size increased with the increase in the Ch/B. By comparing three different kinds of cementitious binders, the dry density of the material prepared with OPC was 942 kg/m3, the compressive strength of the material prepared with SAC was 13.5 MPa, and the thermal conductivity of the material prepared with slag was the lowest at 0.15 W/m/K. From the perspective of low-cost and low-carbon emissions, it was determined that the best way to prepare a light cementitious composite with waste wood chips is to use granulated blast furnace slag (GBFS) as the cementitious binder.
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