Relevant bibliographies by topics / Structural sealant

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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 'Structural sealant'

Author: Grafiati
Published: 4 June 2021
Last updated: 16 February 2022

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Journal articles on the topic "Structural sealant"

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Yildirim, Yetkin. "Field performance comparison of asphalt crack-filling materials: hot pour versus cold pour." Canadian Journal of Civil Engineering 34, no. 4 (April 1, 2007): 505–12. http://dx.doi.org/10.1139/l06-143.

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One of the most important components of pavement maintenance has been the sealing of cracks. The most commonly used materials for crack sealing are hot-pour sealants, such as hot rubber asphalt. However, this material can be hazardous at high operating temperatures and is more likely to be picked up by vehicle tires if the sealant is not sufficiently adhered to the pavement. Thus, cold-pour sealants have been considered as an alternative for crack sealing purposes. This study aims to compare the performance of hot-pour rubber asphalt crack sealant and cold-pour asphalt emulsion crack sealant in five different Texas districts that experience different weather conditions. The comparison includes seven different crack sealants: three cold pour and four hot pour. Five different roads in five districts were selected for comparison of the sealants. The field study results indicate that hot-pour sealants performed better than cold-pour sealants.Key words: sealants, emulsified crack sealants, crack sealing, asphalt pavements.
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Masson, J. F., P. Collins, and P. P. Légaré. "Performance of pavement crack sealants in cold urban conditions." Canadian Journal of Civil Engineering 26, no. 4 (August 1, 1999): 395–401. http://dx.doi.org/10.1139/l99-003.

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Twelve bituminous hot-pour crack sealants were evaluated over four years in temperatures ranging from -40°C to +40°C. Each sealant was evaluated over 900 linear meters of transverse and longitudinal routs of 12 × 12 mm2, 19 × 19 mm2, and 40 × 10 mm2 (width × depth). Results show that sealant source, rout size, and rout orientation affected sealant performance, i.e., debonding and pull-out levels. Debonding levels were 0-50% and pull-out levels 0-30%. Sealant failure was proportional to rout width; it was lowest in 12 mm wide routs and highest in 40 mm wide routs. This result is attributed to the proportional exposure of sealants to slow moving traffic. The increase of sealant failure over time was also found to be nonlinear. Three stages were identified in the failure-time plot. In stage 1, failure is rapid; in stage 2, it plateaus; and in stage 3, it increases again. Failure in stage 1 is thought to be related mainly to a weak sealant - asphalt concrete interface, whereas that in stage 3 is thought to be related to sealant weathering and stiffening. It was also found that standard test results correlate poorly with field performance.Key words: pavement, crack sealing, sealant, performance, cold weather, failure.
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Masson, J. F., Peter Collins, Sladana Bundalo-Perc, John R. Woods, and Imad Al-Qadi. "Variations in Composition and Rheology of Bituminous Crack Sealants for Pavement Maintenance." Transportation Research Record: Journal of the Transportation Research Board 1933, no. 1 (January 2005): 107–12. http://dx.doi.org/10.1177/0361198105193300112.

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Bituminous crack sealants are used for the preventive maintenance of asphalt concrete pavements. The selection of a durable sealant can be difficult, however, mainly because of the lack of correlation between standard sealant specifications and field performance. Hence, an approved list of materials based on past performance is sometimes used to select sealants. However, sealant durability and performance vary over time. To investigate the effect of sealant lot variation on sealant properties, six lots of two sealants from different suppliers were analyzed for filler and polymer contents and rheological response. It was found that the difference in composition and rheology between lots can be similar to that between sealants produced by different manufacturers. Hence, sealant lot-to-lot variation can partly explain the variation in the field performance of sealants. Therefore, lists of approved products drawn from the field performance of past years are ineffective in the selection of sealants for future maintenance. The application of segregated sealants was also investigated, including assessing the effect of melter stirring on sealant homogeneity and measuring the segregation of sealant upon cooling. It was found that sealants do not segregate after their application and subsequent cooling and that a rapid circumferential stirring of 25 revolutions per minute in the heating kettle allowed for the remixing of a segregated sealant.
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Masson, J.-F., P. Collins, D. Perraton, and I. Al-Qadi. "Rapid assessment of the tracking resistance of bituminous crack sealants." Canadian Journal of Civil Engineering 34, no. 1 (January 1, 2007): 126–31. http://dx.doi.org/10.1139/l06-120.

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The bituminous sealants used in the preventive maintenance of pavements sometimes deform (track) under the action of passing vehicles. In summer, this is the prevalent mode of sealant failure. To assess the propensity of a sealant to deform in summer, a standard flow test is used, but the imprecision in the results has prevented any correlation with field performance. Two methods were evaluated in an attempt to find an alternative means of assessing deformation. The first method relied on the use of the French rut tester, and the second method relied on the use of a Taber abraser. The first method was found to be inappropriate to test sealants because of its severity, but the second method proved promising. The Taber abraser allowed for the measurement of sealant displacement at various temperatures and for distinguishing the deformation propensity of sealants.Key words: pavements, roadways, maintenance, sealants, sealing, specification, testing, performance.
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Muntean, Alexandrina, Sorina Sava, Sarosi Codruta, Marioara Moldovan, Mariana Pacurar, and Ada Gabriela Delean. "Assessment of Water Sorption, Solubility and Interface Properties for Two Different Pit and Fissure Sealants." Materiale Plastice 57, no. 3 (September 30, 2020): 81–88. http://dx.doi.org/10.37358/mp.20.3.5382.

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The purpose of modern dental medicine is to prevent dental caries and promote minimally invasive techniques at the expense of invasive methods. Dental sealants are largely recommended for occlusal surfaces protection, but concerns are related about microleakage at material-enamel interface. This in vitro study aimed to investigate the association between chemical structure, sealing capacity and marginal infiltration for 2 fluoride F containing commercially available resin-based sealants: Pit&Fissure� Sealant (DMP) and Fissurit FX� (Voco) in order to achieve a better description and ensure adequate material selection in every day practice. An optimal resin-based sealant should mimic the structural, physical and mechanical characteristics of enamel. The main difference between the sealing materials tested is based on the amounts of inorganic filler and on the various shapes of the particles in the filler. Pit&Fisure� Sealant express less attachment at enamel interface, higher sorption and greater water solubility, when compared to Fissurit FX�. The better sealing capacity of Fissurit FX� can be described by the homogeneity of the material and the very small size of the inorganic fillers. Dental materials properties used as pit and fissure sealants are sensitive to mechanical, thermic and chemical stress from oral cavity. Regular dental check-up can detect the presence and integrity of sealant and ensure preventive effect in time.
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Sawalha, Mohammed, Hasan Ozer, Imad L. Al-Qadi, and Hengxiao Xue. "Development of a Modified Adhesion Test for Hot-Poured Asphalt Crack Sealants." Transportation Research Record: Journal of the Transportation Research Board 2612, no. 1 (January 2017): 85–95. http://dx.doi.org/10.3141/2612-10.

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Crack sealing is a maintenance technique commonly used for cracks and joints to prevent moisture infiltration into pavements. Crack sealing materials should possess adequate adhesive and cohesive properties to remain intact in the cracks or joints, depending on the environment and pavement conditions in which they are installed. Adhesion failure is the most common failure mechanism and occurs mostly because of the poor adhesion capacity of sealants as well as the installation quality. Various standard laboratory tests are currently used to evaluate the adhesive properties of sealants to predict their field performance. These tests, however, either lack correlation with the field performance or have not yet been validated. This paper introduces the development of an adhesive prediction test: the modified crack sealant adhesion tester (modified CSAT). The modified CSAT is an improved version of the existing CSAT standard (AASHTO TP 89) and showed consistent results between specimens with sufficient repeatability. In addition, the modified CSAT was successful in capturing the effect of temperature changes and aging on the adhesion capacity of sealants. The adhesion test results were compared with the performance of the same sealants installed at different test sites. The correlation between the adhesion loads obtained in the laboratory was consistent with the sealant field performance.
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Fried, Andrew, Haritha Malladi, and Cassie Castorena. "Impact of Crack Sealant on Pavement Skid Resistance." Transportation Research Record: Journal of the Transportation Research Board 2673, no. 7 (June 2, 2019): 362–70. http://dx.doi.org/10.1177/0361198119849590.

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Crack sealing is often a cost-effective preventive maintenance strategy for prolonging pavement service life when applied to pavements in relatively good condition. Crack sealing is generally ineffective for extending the life of heavily cracked pavements. However, crack sealing is often applied to pavements with extensive cracking. The application of crack sealing to pavements with extensive cracking can pose a skid resistance hazard. This study investigates the relationship between the amount and distribution of crack sealant application and pavement skid resistance. Locked-Wheel Skid Tester (LWST) testing was conducted on several pavement projects in North Carolina, United States, with varying amounts and patterns of crack sealant. Images of the locations of LWST testing were obtained and processed to determine the percentage of the pavement surface area covered by crack sealant. A relationship between the percentage of the wheel path covered by crack sealant and LWST results was established that demonstrates the application of high amounts of crack sealant to the wheel path can pose safety hazards. The effect of crack sealant on pavement skid resistance is a function of the existing pavement’s frictional characteristics. The results of this study highlight the need for the development of crack sealant specification provisions to avoid the loss of skid resistance.
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Pan, Danguang, Kun Jiang, Xichen Zhang, and Ying Huang. "Sealant Delamination Detection of Structural Sealant Glazing Systems Based on Driving-Point Accelerance." Shock and Vibration 2020 (May 18, 2020): 1–13. http://dx.doi.org/10.1155/2020/7260438.

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The structural sealant glazing system is widely used in glass curtain wall worldwide. However, due to the aging of the sealants, cracking may form along the sides of the glass. If the panel of curtain wall arises, delamination may occur and induce failure or loss of the system. In order to detect the delamination of the sealant, in this paper, a new vibration-based damage identification method is proposed by using the difference between the predamage and postdamage driving-point accelerance (DA). This detection method would require only one acceleration sensor on a glass panel and a rubber hammer, which operates very conveniently. When the rubber hammer taps the glass panel near the acceleration sensor, the glass curtain wall panel would generate acceleration response which can be measured by the acceleration sensor. The measured acceleration responses will be used to calculate the DA and lead to a new delamination index, called relative accumulative difference of DA, which will give indications on the potential delamination of the sealant. In addition, the influence of the acceleration sensor installation position was analysed by the finite element method, and the optimal sensor location was determined to be at the intersection of the long-side quarter and the short-side quarter. Nine cases on various delamination severities were identified by the new method, as well as the natural frequency reduction and modal assurance criterion. The laboratory experiments showed that the relative accumulative difference of DA is extremely sensitive to sealant delamination. Even if delamination severity was only 6.39%, the relative accumulative difference of DA would be larger than 18%. As the delamination of the sealant progresses, the relative accumulative difference of DA increases, resulting in an effective detection method for sealant delamination of the structural sealant glazing system. The fundamental frequency reduction is suitable to identify relatively large delamination, and the modal assurance criterion of higher modes is also sensitive to sealant delamination.
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Kim, Jinho, Dan Zollinger, and Seunghyun Lee. "Experimental Study on the Design and Behavior of Concrete Pavement Joint Sealants." Transportation Research Record: Journal of the Transportation Research Board 2675, no. 6 (February 12, 2021): 369–79. http://dx.doi.org/10.1177/0361198121993472.

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Joints in concrete pavement are intended to provide freedom of movement in a concrete slab relative to the volumetric effects. Changes such as this can occur owing to drying shrinkage, temperature changes, and moisture differences that develop within the slab. A key reason to seal the rigid pavement joints is to prevent, or at least reduce, the amount of water from rainfall events infiltrating the pavement structure, which can ultimately contribute to subbase erosion, loss of support, and the build-up of a fine, incompressible material on the face of the joint. The strength of the joint sealant bond and stress of the interface between the sealant and the face of the joint reservoir play important roles in joint sealant failure. Thus, in this research, experimental coupling tests were conducted to investigate the geometric characteristics of the sealant/joint reservoir design. The stress–strain relationship on the interface was investigated according to its geometry, both with regard to the shape factor (SF) and the degree of curvature (DoC). The SF and DoC were evaluated through a tensile test of the joint sealant based on these geometric characteristics. Also discussed are the shape factors (SFs) of the joint sealant currently being recommended, the SF most appropriate for a narrow-width joint, and the surface finish of the joint sealant. Based on this study, the effects of sealant geometries (i.e., SF and DoC) should be considered during design and installation. Also, further research into more realistic SFs for narrow-width joints and self-leveling sealants is recommended.
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Gurjar, Ashok, Hyung B. Kim, Eric Moody, and Neeraj J. Buch. "Laboratory Investigation of Factors Affecting Bond Strength in Joint Sealants." Transportation Research Record: Journal of the Transportation Research Board 1627, no. 1 (January 1998): 13–21. http://dx.doi.org/10.3141/1627-03.

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An experimental program was carried out to study the factors that affect the bond of joint sealants to concrete substrate. The factors investigated included the preparation technique, aggregate type in concrete substrate, temperature and humidity during curing period, and sealant type. A series of analysis of variance (ANOVA) tests were conducted to analyze the data. This study clearly demonstrated that not all sealants are affected by the same factor and that the influence depends on the material type and interactions among the variables studied. Silicone-based sealants were found to be highly influenced by preparation type and curing temperature, whereas asphaltic-based material was significantly influenced by the aggregate type used in the concrete substrate. This suggests that the additional cost of priming may be justified because of gain in bond strength for silicone sealants. Higher substrate temperature was found to be beneficial to the asphaltic sealant materials.
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Dissertations / Theses on the topic "Structural sealant"

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Soriano, Jonathan Nuesa. "Photochemical tissue bonding as a growth factor sealant and structural reinforcer for the improved regeneration and repair of peripheral nerve and spinal cord." Thesis, Boston University, 2012. https://hdl.handle.net/2144/12636.

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Thesis (M.A.)--Boston University PLEASE NOTE: Boston University Libraries did not receive an Authorization To Manage form for this thesis or dissertation. It is therefore not openly accessible, though it may be available by request. If you are the author or principal advisor of this work and would like to request open access for it, please contact us at open-help@bu.edu. Thank you.
Photochemical tissue bonding (PTB) is an emerging technique used to create an immediate water-tight seal between membranes. While its properties of collagen cross-linking activated under visible light, have yet to be completely understood, much can be described about its applications for repair and structural reinforcement. PTB sealing was tested in conjunction with standard suture repair and treatment with the growth factor leukemia inhibitory factor (LIF) to show that PTB sealing of the sutured wound alone was sufficient to significantly improve functional recovery in rats after peripheral nerve transection. The addition of LIF to potentially improve proximal nerve regeneration did not have a significant effect on functional recovery. Histological findings in all three groups were similar. PTB was also used to reinforce structurally weak membranes, such as the rat spinal cord, imparting the ability to hold sutures and be deftly manipulated. These and other data show that PTB is a powerful tool for cellular, specifically nerve, recovery and regeneration, as well as a useful architectural reinforcer.
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Bigwood, David Andrew. "The design of structural adhesive joints." Thesis, University of Surrey, 1990. http://epubs.surrey.ac.uk/770397/.

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This thesis details the work carried out under two research projects at the University of Surrey. The first project titled The Design of Structural Adhesive Joints', was of three years duration from September 1985 to August 1988 and was sponsored by the Science and Engineering Research Council. The second project, sponsored by Ford UK Ltd, and tided 'A General Joint Analysis Facility extended certain aspects of the analysis work initiated In the first period of research. The objective of the work was to address the problem of integrating structural adhesives Into the design process and to provide procedures that would facilitate this integration in a quantitative, rather than the more usual qualitative way. To be effective, such an approach needed to consider not only a means of analyzing a proposed joint but also a way of predicting the actual failure of that joint. An extensive literature survey of analyses available to the design engineer has been completed. The analyses investigated were found to be lacking in several critical respects, and as part of this research, methods of analysis overcoming some of these limitations have been developed. The analyses produced are based on earlier approaches but extended and modified as appropriate. The work on all the analyses produced has been carried out by considering a simple adherend-adhesive sandwich configuration. Five different analyses, considering the sandwich to be modelled with differing degrees of complexity, have been produced. In all of the analyses the adherends are assumed to behave as cylindrically bent plates capable of sustaining both tensile and shear forces and bending moments, with the adhesive transmitting both tensile and/or shear loads. Initially an elastic solution was obtained, adopting a relatively simple approach. This enabled the subsequent enhancement of including non-linear material behaviour to utilize the same governing equations, thus maintaining consistentcy. The General Elastic Analysis (GEA) has been extensively simplified to produce a number of two parameter design formulae suitable for use by an engineer at an early stage in the design process. The two analyses produced by this simplification are called the Simplified Peel Analysis (SPA) and the Simplified Shear Analysis (SSA), so called because they consider the named component of stress in the adhesive layer only. The GEA was then extended to include non-linear material properties in the adhesive layer, and an analysis called the Non-linear Adhesive Analysis (NLAA) was produced. A programme of validation using the NLAA and a non-linear finite element analysis of similar joint configurations was carried out. Additional comparisons with existing analyses have also been undertaken where possible. The NLAA has been shown to produce extremely accurate results for the stresses in the adhesive layer when compared with the component stresses predicted by the finite element method (FEM). The NLAA has been used successfully to determine the spread of yield in a single-lap joint, giving dose agreement with results from analysis using the FEM, but with much reduced computer and operator time. The final stage of the work was concerned with the Inclusion of non-linear adherend material properties, and an analysis called the Full Non-linear Analysis (FNLA) has been produced which Incorporates this refinement to the general model. Again the finite element method has been used to assess the accuracy of this new analysis, and the results from this work are presented here. Derivations of both forms of the elastic analysis and of the non-linear and full non-linear analyses are reported in Chapters 4 and 5 and the software appropriate to each Is described fully. The Initial survey of available literature has shown that there Is considerable lack of knowledge about possible causes of joint failure. Specifically, It Is noted that a criterion by which joint failure can be measured has not been uniquely defined. In an attempt to provide a criterion or criteria to enable the prediction of joint failure a 'Failure Criteria' test and analysis programme has been completed. Joint configurations were manufactured using a range of adhesives with different levels of ductility, and adherends of different stiffnesses. Batches of these test coupons were tested to failure under both predominantly mode I and mode 11ty pes of loading. Both FEM and FNLA analyses of each test configuration have been carried out, and the stress and strain distributions at the levels of failure load were established for each batch and studied to establish any correlation between various proposed failure criteria. Close agreement between certain factors and the equivalent bulk material properties was noted for test batches. The applicability of various failure criteria for both the mode I and mode II test configurations and possible general criteria are discussed. The failure of the mode I test configurations has been shown to be governed by the local level of maximum principal stress at the end of the overlap. The mode II test configurations also show dose agreement in terms of the maximum principal stress, but agreement with bulk data Is poor. Therefore, a further failure criterion is proposed for the mode II joints in terms of the 'global yielding' of the adhesive layer. The bulk property testing of the adherend and adhesive materials to establish their physical properties for use in the finite element analysis of the test programme Is also fully documented.
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Su, Ning. "Durability and fatique performance of structural adhesives and adhesive joints." Thesis, University of Dundee, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.240601.

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Kadioglu, Ferhat. "Quasi-static and dynamic behaviour of a structural pressure-sensitive adhesive." Thesis, University of Bristol, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.311379.

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Todd, Charles Peter Debenham. "Non-destructive evaluation of adhesively bonded structures using ultrasonic Lamb waves and artificial neural networks." Thesis, Keele University, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.361828.

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Simmons, Robert William. "The effect of polyacrilamide based soil conditioners on structural sealing at sub-process level." Thesis, University of Kent, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.242905.

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Bonsu, Mensah. "Structural stability and surface sealing as related to organic matter depletion of a shallow organic soil." Thesis, University of British Columbia, 1987. http://hdl.handle.net/2429/26961.

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A physically based model describing the mechanism of surface sealing of soil was evaluated in the context of aggregate stability. The intent of the model study was to better understand the effect of mixing fine-textured mineral subsoil with organic surface soil on structural stability and surface seal formation. The mixing results from tillage and harvesting operations, and management practices such as levelling. The index derived from the model showed that sealing of the shallow organic soil increased with an increase of mineral matter content. The mathematical formulation of the model was based on the principle of conservation of mass and Darcy's law for flow of water through a layered soil column. Assuming convective flow, it was shown theoretically that the rate of surface seal formation is proportional to the flux density of the filtrate, as assumed by Scheidegger (1974). In the model it was further assumed that the pore necks at the soil surface clog first before the seal develops. The assumption that convective flow alone was responsible for the movement of the suspension is likely incorrect for suspensions derived from medium or coarse textured soils, since sedimentation does influence the movement of larger particles. However, introducing a constant sedimentation parameter into the convective flow model did not improve the model. Therefore, it is likely a non-constant sedimentation parameter could improve the model considerably. The model showed that for sufficiently large times the flux density of a filtrate flowing through a soil column at a constant hydraulic head is proportional to inverse square root of time. Testing the model experimentally showed a good agreement between theory and experiment. A highly significant correlation between the soil stability factor derived from the model and aggregate stability suggests that the index is a soil structural attribute. The soil stability factor was exponentially related with aggregate stability and mineral matter content. However, whereas the relationship between the soil stability factor and aggregate stability gave a positive exponent, a negative exponent was obtained with mineral matter content. Further studies showed that structural stability and saturated hydraulic conductivity of the aggregate beds were positively and significantly correlated exponentially. However, saturated hydraulic conductivity and mineral matter content were negatively and significantly correlated exponentially. Collateral to the results of the model, the strong negative correlation between wet-sieved aggregate stability and mineral matter content confirmed the deleterious effect of mixing fine-textured mineral soil on the structure of the shallow organic soil. It was theorized that aggregates stabilized through clay-organic complexing are likely to be much stronger than aggregates stabilized through other mechanisms. This implies that whenever the mineral matter content is much higher than the organic matter content, the surplus mineral matter that does not interact with organic matter will be most dispersible. The high silt content of the mineral matter fraction is likely to be an important factor contributing to the decrease in structural stability with increasing mineral matter content. Once the clay and the organic colloids have interacted, the silt that remains is not capable of forming stable aggregates without colloids (Baver et al. 1972). From measurements of the air to water permeability ratio, the decrease in saturated hydraulic conductivity of the aggregate beds with increasing mineral matter content was attributed to slaking of the mineral matter fraction. However, it is possible for the soil with high mineral matter content to be stable if the mineral matter is allowed to be in contact with the organic matter for a long period of time.
Land and Food Systems, Faculty of
Graduate
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Oun, Hatem Ahmed. "Pressure-drop studies in porous multi-layered inconel structures : potential for aero-engine sealing application." Thesis, University of Nottingham, 2016. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.716833.

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Open-cell porous metals and alloys, based on polymer foam replication techniques, have been performing significantly well and, in many cases, replacing traditional porous metals, including metal foams, in various applications because of their unique properties and structural features including high porosity, semi-uniform structure, light weight and high surface to volume ratio. In applications requiring flow of fluids (gas, liquid or both) through open-cell porous structures, for instance in multi-stage filters, heat exchangers, water purification and the storage and transfer of liquid, pressure-drop and flow characteristics of the fluid are essential parameters in application design and performance. Despite the fact that pressure-drop is often sought to be minimised, high pressure-drop is sometimes required such as when used as abradable seals in jet engines. In this work, the structure of Inconel 625, open-cell porous metals (with nominal cell sizes 450, 580, 800 and 1200 pm) were studied in detail using a series of imaging and morphological techniques. The effect of airflow velocity, in the range of 0-70 m s'1, on the pressure-drop characteristics for bulk and structurally tailored, diffusion bonded, multi­layered, open-cell porous structures, as a function of thickness (affected by sectioning), density (affected by compression) and structural alterations (affected by multi-pore sized insets, porous metal stacking and air gaps), were thoroughly investigated. As the air flow velocity increases, fluid properties tend to change and drag force increases in comparison with the viscous effect causing the pressure drop data to deviate from the non­linear, quadratic Forchheimer model into a cubic equation at a velocity value higher than 20 m s'1. The need for accurate pinpointing of the different regimes (Darcy, Forchheimer and Turbulent), which enables precise determination of the permeability (K) and form drag coefficient (C), was highlighted. Understanding the pressure-drop behaviour for multi­layered, open cell porous structures will offer the possibility for combining layers with different porosities and pore sizes giving the ability to tailor the structure to achieve bespoke flow conditions for demanding applications. For example, the use of a 9 mm thick porous structure in three different configurations (bulk, stacked and gapped) causes the pressure-drop to change drastically, while having the same weight (3.38g), thus, the potential for mass-efficient porous structures is readily achievable.
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Tafoya, Keirsten Breann. "Process Improvement of Surface Preparation of Structuraly Bonded Helicopter Detail Parts." Thesis, University of North Texas, 2018. https://digital.library.unt.edu/ark:/67531/metadc1404599/.

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The objective of this study was to increase the bond strength at the surface interface of a thin stainless-steel panel for structural bonding on a helicopter. To achieve this objective, six activation methods for applying the coating to the panel in the surface preparation process are presented and explored. Adhesion and roughness tests were conducted to determine which method consistently initiates the etch and improves the bond at the surface. Based on the test results, three methods proved to be effective in initiating the etch. Of the three effective methods, only one method exhibited significantly improved bond strength at the surface interface as well as consistently initiated the etch in solution. The applicability of this method is discussed, and recommendations are presented for further study.
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Ranade, Shantanu Rajendra. "Performance Evaluation and Durability Studies of Adhesive Bonds." Diss., Virginia Tech, 2014. http://hdl.handle.net/10919/64990.

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In this dissertation, four test approaches were developed to characterize the adhesion performance and durability of adhesive bonds for specific applications in areas spanning from structural adhesive joints to popular confectionaries such as chewing gum. In the first chapter, a double cantilever beam (DCB) specimen geometry is proposed for combinatorial fracture studies of structural adhesive bonds. This specimen geometry enabled the characterization of fracture energy vs. bondline thickness trends through fewer tests than those required during a conventional "one at a time" characterization approach, potentially offering a significant reduction in characterization times. The second chapter investigates the adhesive fracture resistance and crack path selection in adhesive joints containing patterns of discreet localized weak interfaces created using physical vapor deposition of copper. In a DCB specimen tested under mode-I conditions, fracture energy within the patterned regions scaled according to a simple rule of mixture, while reverse R-curve and R-curve type trends were observed in the regions surrounding weak interface patterns. Under mixed mode conditions such that bonding surface with patterns is subjected to axial tension, fracture energy did not show R-curve type trends while it was observed that a crack could be made to avoid exceptionally weak interfaces when loaded such that bonding surface with defects is subjected to axial compression. In the third chapter, an adaptation of the probe tack test is proposed to characterize the adhesion behavior of gum cuds. This test method allowed the introduction of substrates with well-defined surface energies and topologies to study their effects on gum cud adhesion. This approach and reported insights could potentially be useful in developing chewing gum formulations that facilitate easy removal of improperly discarded gum cuds from adhering surfaces. In the fourth chapter we highlight a procedure to obtain insights into the long-term performance of silicone sealants designed for load-bearing applications such as solar panel support sealants. Using small strain constitutive tests and time-temperature-superposition principle, thermal shift factors were obtained and successfully used to characterize the creep rupture master curves for specific joint configurations, leading to insights into delayed failures corresponding to three years through experiments carried out in one month.
Ph. D.
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Books on the topic "Structural sealant"

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Flick, Ernest W. Construction and structural adhesives and sealants: An industrial guide. Park Ridge, N.J., U.S.A: Noyes Publications, 1988.

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2

Institute, American Concrete, ed. Joint sealing and bearing systems for concrete structures. Detroit (P.O. Box 19150, Redford Station, Detroit 48219): American Concrete Institute, 1986.

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Ding, Mei. Self-sealing/healing isolation and immobilization caused by chemical discontinuities in porous media. [Utrecht: Universiteit Utrecht, 1998.

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4

Simpson, David P. State-of-the-art procedures for sealing coastal structures with grouts and concretes. [Vicksburg, Miss: U.S. Army Engineer Waterways Experiment Station, 1989.

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5

World Congress on Joints & Bearings (4th 1996 Sacramento, Calif.). The Fourth World Congress on Joint Sealing and Bearing Systems for Concrete Structures. Edited by Atkinson Barrie and American Concrete Institute. Farmington Hills, Mich: American Concrete Institute, 1996.

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6

World Congress on Joints & Bearings (2nd 1986 San Antonio, Texas). Joint sealing and bearing systems for concrete structures: World Congress on Joints & Bearings. Detroit: American Concrete Institute, 1986.

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Ketcham, Stephen A. Structural mechanics solutions for butt joint seals in cold climates. Hanover, NH: US Army Corps of Engineers, Cold Regions Research & Engineering Laboratory, 1996.

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Zipf, R. Karl. Compendium of structural testing data for 20-psi coal mine seals. Pittsburgh, PA: Dept. of Health and Human Services, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, Pittsburgh Research Laboratory, 2009.

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World Congress on Joints & Bearings (2nd 1986 San Antonio, Texas). Joint sealing and bearing systems for concrete structures: 2nd World Congress on Joints and Bearings. Detroit: American Concrete Institute, 1986.

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Joining of materials and structures: From pragmatic process to enabling technology. Amsterdam: Elsevier, 2004.

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Book chapters on the topic "Structural sealant"

1

Lee, Sang Kook, Miyauchi Hirouki, and Jin Young Jeong. "Reliability Assessment of Structural Sealant Durability." In Durability of Building and Construction Sealants and Adhesives: 5th Volume, 65–84. 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959: ASTM International, 2015. http://dx.doi.org/10.1520/stp158320140084.

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Guan, Jack Yue Shu. "Evaluation of Structural Performance of Aged Structural Glazing Sealant." In Durability of Building and Construction Sealants and Adhesives: 6th Volume, 168–85. 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959: ASTM International, 2018. http://dx.doi.org/10.1520/stp160420170111.

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Memari, A. M., S. Fisher, C. Krumenacker, K. A. Broker, and R. U. Modrich. "Evaluation of the Structural Sealant for Use in a Four-Sided Structural Sealant Glazing Curtain-Wall System for a Hospital Building." In Durability of Building and Construction Sealants and Adhesives: 4th Volume, 505–28. 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959: ASTM International, 2012. http://dx.doi.org/10.1520/stp49534t.

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Memari, A. M., S. Fisher, C. Krumenacker, K. A. Broker, and R. U. Modrich. "Evaluation of the Structural Sealant for Use in a Four-Sided Structural Sealant Glazing Curtain-Wall System for a Hospital Building." In Durability of Building and Construction Sealants and Adhesives: 4th Volume, 505–28. 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959: ASTM International, 2012. http://dx.doi.org/10.1520/stp154520120024.

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Ishii, Hisashi. "Application Possibility of Four-Sided Structural Sealant Glazing Systems in Japan." In Durability of Building and Construction Sealants and Adhesives: 5th Volume, 85–105. 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959: ASTM International, 2015. http://dx.doi.org/10.1520/stp158320140095.

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Kaatz, Rico, and Christoph Recknagel. "Advanced Evaluation of Structural Sealant Glazing Systems by a New System Test Approach." In Durability of Building and Construction Sealants and Adhesives: 5th Volume, 376–402. 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959: ASTM International, 2015. http://dx.doi.org/10.1520/stp158320140074.

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Broker, K. A., S. Fisher, and A. M. Memari. "Seismic Racking Test Evaluation of Silicone Used in a Four-Sided Structural Sealant Glazed Curtain Wall System." In Durability of Building and Construction Sealants and Adhesives: 4th Volume, 473–504. 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959: ASTM International, 2012. http://dx.doi.org/10.1520/stp49533t.

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Broker, K. A., S. Fisher, and A. M. Memari. "Seismic Racking Test Evaluation of Silicone Used in a Four-Sided Structural Sealant Glazed Curtain Wall System." In Durability of Building and Construction Sealants and Adhesives: 4th Volume, 473–504. 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959: ASTM International, 2012. http://dx.doi.org/10.1520/stp154520120023.

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Edwards, S. C. "Leak sealing." In The Repair of Concrete Structures, 102–21. Boston, MA: Springer US, 1993. http://dx.doi.org/10.1007/978-1-4899-7208-8_9.

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Jung, Jinyoung, Kendo Hahn, and Hyoungwook Lee. "Weathering Evaluation of Structural Silicone Sealants Used in Korea." In Durability of Building and Construction Sealants and Adhesives: 4th Volume, 370–84. 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959: ASTM International, 2012. http://dx.doi.org/10.1520/stp49527t.

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Conference papers on the topic "Structural sealant"

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Ueno, G., and Y. L. Nava. "Coating Protection Against Atmospheric Corrosion for Iron and Steel Structural Components: Status of Metallization in Japan." In ITSC 1997, edited by C. C. Berndt. ASM International, 1997. http://dx.doi.org/10.31399/asm.cp.itsc1997p0191.

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Abstract Low-velocity oxyfuel-spray and arc-spray coatings of Zn, Zn-Al, Al, and various Al-Si and Al-Mg alloys were tested in immersion and salt-spray conditions with artificial sea water for up to 6,000 hours. Coatings were tested as-sprayed or sealed with fluorocarbon, epoxy or silicone sealants. Comparison and overview of coatings recommended by international and Japanese standards are considered. Coatings Al 99.8 outperformed Zn 99.9 and Zn-13A1 ones while Al-(2.5~5.2)Mg and Al-(5~6)Si showed better corrosion resistance than Al 99.8 coatings. The silicone sealant offered better resistance than fluorocarbon and epoxy organic sealants.
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Memari, A. M., X. Chen, P. A. Kremer, and R. A. Behr. "Development of Failure Prediction Models for Structural Sealant Glazing Systems under Cyclic Racking Displacement Conditions." In Architectural Engineering Conference (AEI) 2006. Reston, VA: American Society of Civil Engineers, 2006. http://dx.doi.org/10.1061/40798(190)6.

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Simmons, Nicholas C., and Ali M. Memari. "Racking Performance Analysis of Four-Sided Structural Sealant Glazing Curtain Wall Systems Through Video Capture Technique." In Architectural Engineering Conference 2013. Reston, VA: American Society of Civil Engineers, 2013. http://dx.doi.org/10.1061/9780784412909.071.

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Simmons, Nicholas C., and Ali M. Memari. "Development of Kinematic Equations for Racking Performance Evaluation of Four-Sided Structural Sealant Glazing Curtain Wall Systems." In Architectural Engineering Conference 2013. Reston, VA: American Society of Civil Engineers, 2013. http://dx.doi.org/10.1061/9780784412909.097.

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Memari, A. M., S. Fisher, C. Krumenacker, K. A. Broker, and R. U. Modrich. "Seismic Evaluation of the Four-Sided Structural Sealant Glazing Curtain Wall System for Cathedral Hill Hospital Project." In Architectural Engineering Conference (AEI) 2011. Reston, VA: American Society of Civil Engineers, 2011. http://dx.doi.org/10.1061/41168(399)20.

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Miao, Yong-hong, Yinjie, Guo-jun Cai, and Jian-zu Gu. "New Measurement Technology of Structural Silicone Sealant in Hidden Frame Supported Glass Curtain Wall Based on FFT Power Spectrum." In 2011 International Conference on Computer Distributed Control and Intelligent Environmental Monitoring (CDCIEM 2011). IEEE, 2011. http://dx.doi.org/10.1109/cdciem.2011.496.

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Simmons, Nicholas C., and Ali M. Memari. "Finite Element Modeling to Predict Racking Test Results and Performance of Four-Sided Structural Sealant Glazing Curtain Wall Systems." In Architectural Engineering Conference 2013. Reston, VA: American Society of Civil Engineers, 2013. http://dx.doi.org/10.1061/9780784412909.072.

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Shan, Xin, and Onur Bilgen. "Optimization of a Bioinspired Piezocomposite Pump Based on an Electromechanical Model." In ASME 2020 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/smasis2020-2207.

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Abstract This paper presents the mechanical design and modeling of an active segment of a bioinspired piezocomposite aquatic pump. The design and analysis is based on an electromechanical Euler-Bernoulli beam model. The self-contained propulsion/pumping system is composed of a series of piezo-active soft cymbal-like segments that are connected by passive soft films. By applying coordinated excitations for expansion and contraction to different active segments, the design creates a traveling wave along the pump axis, which in return propels the fluid to generate a unidirectional thrust force. In the model, the insulation and mechanical properties of the waterproofing sealant layer are considered. Using the proposed electromechanical model, a parametric analysis is conducted to understand the effectiveness of the cymbal-like piezocomposite active segment. Two performance metrics are considered, including the area change of the enclosed by the cymbal-like segment, and the work done by the actuators. The optimal structural parameters of the piezocomposite pump are decided by these performance metrics.
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Ahmaniemi, S., E. Rajamäki, P. Vuoristo, and T. Mäntylä. "Effect of Aluminum Phosphate Sealing Treatment on Properties of Thick Thermal Barrier Coatings." In ITSC 2000, edited by Christopher C. Berndt. ASM International, 2000. http://dx.doi.org/10.31399/asm.cp.itsc2000p1081.

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Abstract Partially stabilized zirconia (8Y2O3-ZrO2) coatings were studied as thick thermal barrier coatings (TTBCs) for diesel engine applications. To improve the hot corrosion resistance of TTBCs the 1 mm thick yttria stabilized zirconia coating was densified with aluminum phosphate based sealant. Combined with better hot corrosion resistance other benefits obtained with sealing treatment are improved adhesion as well as increased mechanical properties of the ceramic layer. Three aluminum phosphate based sealants were investigated with varying viscosity level. Different sealant viscosities were used to optimize the level of sealant penetration into the coating. Sealant penetration and the violence of the reaction were determined by XRD, SEM/EDS and optical microscopy. The hardness profile from bond coat to the surface of the top layer was determined. Coating microstructure and phase structure were characterized by optical microscopy and by X-ray diffraction. Microhardness and porosity were determined. Residual stress states were measured by X-ray based stress analyzer. Bond strength of the coatings was determined with tensile test equipment. To simulate the diesel engine combustion conditions, hot corrosion tests were performed for the sealed TTBCs. Hot corrosion resistance of the coating was tested in isothermal exposure of 60Na2SO4 - 40V2O5 melt for 48 hours at 600 °C.
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Korayem, Abd-Elrahman, Hamid Mohammadi, and Roozbeh Dargazany. "Experimental Investigation on the Performance Loss of Cross-Linked Polymers During Photo-Oxidative Aging." In ASME 2020 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/imece2020-24318.

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Abstract Polymeric substances have seen an unprecedented integration in countless applications and fields of life, subjecting them to a broad range of environmental conditions, which can cause a form of damage to the structural and mechanical properties of these components known as aging. In this study we investigate the effects of the degradation of polymeric materials due to the extended exposure to sunlight, which can be simulated through controlled photo-oxidative aging using ultraviolet (UV) radiation as the main catalyst of this phenomenon. The effects on mechanical behavior and chemical properties of four polymeric materials with different mechanical characteristics was accordingly monitored throughout the study. The materials range in hardness with the polyurethane adhesive being the hardest and acting plastically, followed by an acrylic which exhibits greater hardening with time, a polyurethane sealant, which behaves in an elastomeric manner, and a silicon sealant, which is the softest of the set. Samples were prepared and subjected to UV radiation at three different temperatures namely 45, 60 and 80°C, for different aging periods ranging from 1 day for higher temperatures to 150 days for lower ones. The samples were then subjected to the Fourier transform Infrared spectroscopy (FTIR) test to monitor the change in the chemical composition of the materials along the aging durations and conditions. The materials were then subjected to mechanical testing along two modes of mechanical loading, which are a simple tension until failure and a double-cyclic test with progressively increasing strain limits after every two successful cycles until the sample reaches failure. The samples are loaded at constant strain rates throughout both tests. These tests revealed the change of behavior of our materials along the aging periods and conditions. The changes in mechanical behavior vary across each individual material depending on the aging temperature and period, with the changes ranging from hardening to softening, embrittlement or an increase in the maximum strain the material can endure before failure. A general trend would be that most materials become harder after photo-oxidation, however due to the range of temperatures in the aging conditions, thermo-oxidation, which causes softening in some of the polymers, has an increasingly notable effect at higher temperatures. A visible correlation can be noted between the change in mechanical behavior and a change in absorbance of Infrared Radiation (IR) in the FTIR spectrum, as the greater the crosslinking throughout the polymer matrix, the lower the absorbance of IR radiation due to the increased stiffness of the overall macro-molecular structure.
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Reports on the topic "Structural sealant"

1

Thomas, Jeffery L., and Joan Pope. Sand Sealing of Coastal Structures. Fort Belvoir, VA: Defense Technical Information Center, June 1986. http://dx.doi.org/10.21236/ad1003862.

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Dentz, Jordan, Francis Conlin, and David Podorson. Case Study of Envelope Sealing in Existing Multiunit Structures. Office of Scientific and Technical Information (OSTI), October 2012. http://dx.doi.org/10.2172/1053748.

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Dentz, Jordan, Francis Conlin, and David Podorson. Case Study of Envelope Sealing in Existing Multiunit Structures. Office of Scientific and Technical Information (OSTI), October 2012. http://dx.doi.org/10.2172/1219796.

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