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Mechanical Properties and Microstructure Characteristics of ...
The results of CT test show that freeze-thaw cycle can accelerate the generation of cracks in concrete. In the C+S and C environments, the area and width of concrete cracks are larger than those in other two environments. Meanwhile, the crack width expansion rate in C environment is the fastest in all corrosive environments.
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Graphene oxide on the microstructure and mechanical properties of ...
microstructure of cement hydration products, improve the pore structure of set cement, reduce the volume of micropore in set cement, and increase the compactness of set cement, i.e. apparently strengthen the toughening effect of set cement. The research achievements are useful to improve the mechanical properties of cement based composite ...
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Influence of Nano-SiO2 Addition on Microstructure and Mechanical ...
This study investigates the mechanical properties (compressive and flexural strengths) and microstructural properties (as determined by scanning electron microscopy) of the interfacial transition zone between cement pastes and aggregates of mortars applicable for the casting of thin ferrocement elements combining with nanosilica.
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The Microstructure And Mechanical Properties Of Free Pdf
Microstructure And Mechanical Properties Has Been Systematically Studied. Its In Fluence On Microstructure And Tensile Prop Jul 1th, 2022 Mechanical Behavior, Thermal Properties And Microstructure ... YUAN LIU Et Al: MECHANICAL BEHAVIOR,THERMAL PROPERTIES AND MICROSTRUCTURE ANALYSIS OF . . . DOI 10.5013/IJSSST.a.17.25.13 13.1 ISSN:
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Assessing Mechnical Properties and Microstructure of Fire-Damaged ...
Abstract In the last few years, a number of investigations of engineered cementitious composites (ECC) have been carried out, and the mechanical behavior and durability characteristics of this type of composite are now increasingly better understood. The fire-resist ... [more] Publisher American Concrete Institute Subjects
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Mechanical properties and microstructure of Portland cement concrete ...
The relationship between the microstructure and performance of CRS concrete is established. The CRS has a porous surface with high water intake capacity, which contributes to the mechanical properties of concrete. The interfacial transition zone between the cement paste and CRS is densified compared to normal concrete with river sand.
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Influence of NaCl on Mechanical Properties and Microstructure of Cement ...
The mechanical properties and microstructure of cement stone containing different sodium chloride (NaCl) have been investigated. Uni-axial compression experiments were used to study mechanical properties. The main crystalline phase composition of cement specimens was determined by means of X-ray diffraction (XRD). Surface morphology of cement stone was observed by using scanning electron ...
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Effects of aggregate type, aggregate pretreatment method, s ...
The experimental investigation evaluated the properties of fresh, mechanical, and microstructure of several concrete mixtures that incorporate low‐C3A cement, silica fume, metakaolin, and hybrid ...
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Microstructure and Mechanical Properties of High-Toughness Fiber ...
AbstractThis study investigates the effect of high temperature on microstructure and mechanical properties of high-toughness fiber-reinforced cementitious composites. Pore size distribution, microstructure, and mechanical properties are tested after exposure to 20, 200, 400, 600, and 800°C. The variation of chemical compositions after elevated temperatures leads to color changes of fibers and ...
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PAPER OPEN ACCESS Mechanical properties and microstructure of nano-ZrO ...
mixer. The rheological properties of cement slurry, the mechanical properties and microstructure of cementitious composites were studied. The results indicated that the addition of nano-ZrO2 below 1 wt% meet the requirements of cementing construction. The early compressive strength of cement stone for 1 day was about 35.6 MPa~41.8
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Mechanical Properties and Microstructure Evaluation of Cement Mortar ...
Oct 19, 2021The mechanical properties of CM are affected by the internal microstructure, which is closely related to cement fineness [ 11, 12, 13, 14, 15 ]. Hu et al. [ 12] investigated the effect of cement fineness on CM early-age heat of hydration.
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Mechanical Properties, Failure Mode, and Microstructure of Soil-Cement ...
in order to investigate the effects of fly ash and polypropylene fiber on mechanical properties, failure mode, and microstructure of soil-cement, the unconfined compression test, splitting tension test, and scanning electron microscopy (sem) test of soil-cement with different polypropylene fiber contents (0%, 0.1%, 0.2%, 0.3%, 0.4%, and 0.5% by .
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Dynamic Mechanical Properties and Microstructure of Graphene ... - MDPI
This paper presents an experimental investigation on the effect of uniformly dispersed graphene oxide (GO) nanosheets on dynamic mechanical properties of cement based composites prepared with recycled fine aggregate (RFA). Three different amounts of GO, 0.05%, 0.10%, and 0.20% in mass of cement, were used in the experiments.
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Mechanical Properties of Cementitious Materials at Microscale
This book provides information on characterizing the microstructure and mechanical properties of cementitious materials at microscale. Specifically, with the intention to provide the methods of preparing the samples for the micro-scale mechanical testing, to address the techniques for measuring and analyzing the elastic modulus, the stiffness, and the fracture toughness of cementitious ...
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Effect of Nano-clay on Mechanical Properties and Microstructure of ...
— The effect of nano-clay on the mechanical properties and microstructure of Portland cement mortar was investigated. The main objective of this research is to constitute a blended cement mortar with high mechanical properties. The nano-clay used in this investigation was nano-kaolin. The nano-metakaolin (NMK) was prepared by thermal activation of kaolin clay for 2 hours at 750 o C.
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(Pdf) the Microstructure and Mechanical Properties of Cementitious ...
(PDF) THE MICROSTRUCTURE AND MECHANICAL PROPERTIES OF CEMENTITIOUS MATERIALS COMPRISED OF LIMESTONE, CALCINED CLAY AND CLINKER Home Materials Physics Materials Science Clay THE MICROSTRUCTURE AND...
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Vplivtoplotneobdelavenamikrostrukturoinmehanskelastnostizlitinzabate ...
This form and distribution of the primary Si crystals and intermetallic phases in the microstructure of a cast piston reduce the mechanical properties of the investigated piston.
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The Microstructure and Mechanical Properties of Cementitious Materials ...
Limestone, calcined clay and cement (LC 3) are one of the low carbon cement materials which are used as a partial substitution of clinker and Portland cement. In this study, the effects of limestone and calcined clay (LC2) on the mechanical properties and microstructure of mortars were studied under multi-scales.
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Mechanical Properties and Microstructure of Basalt Fiber Reinforced ...
Aug 16, 2022The mechanical property test is aimed at the splitting tensile strength and compressive strength of concrete after different cycles. The microstructure test is to study the hydration products by scanning electron microscope (SEM) and the pore structure of concrete by mercury intrusion porosimetry (MIP) test.
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Search Microstructure: calculating gas properties | SPE
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Improvement of Mechanical Properties and Microstructure of Cementitious ...
Jul 14, 2022The hot-dry environment in high geothermal tunnels negatively affects the development of properties of cementitious materials. In order to improve the mechanical properties of cementitious materials in such environments, a proper curing system was developed, the material compositions were taken into account, and the related mechanism was analyzed by microscopic tests. The results showed that ...
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Microstructure of concrete and its influence on the mechanical properties
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Fresh, Mechanical, and Microstructural Properties Investigation on the ...
Mechanical properties of the hardened concrete from four different mixes were also determined for the 7- and 28-day cured specimens. The microstructural properties of the hardened concrete for all mixes were also investigated using scanning electron microscopy (SEM) and X-ray diffraction (XRD) tests.
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Mechanical properties and microstructure of basalt fiber-reinforced ...
For the BF-reinforced recycled concrete (BFRRC), basic mechanical tests, including cubic compression, axial compression, splitting tension, and bending resistance are carried out, and an in-depth analysis of the microstructure was performed through scanning electron microscopy.
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A Comparative Study on the Mechanical Properties and Microstructure of ...
To understand the effects of EC and steam curing (SC) on the mechanical properties and microstructure of cement-based materials, the mortar was cured at different temperature-controlled curing regimes (40 °C, 60 °C, and 80 °C). Meanwhile, the mechanical properties, hydrates and pore structures of the specimens were investigated.
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Mechanical properties of cement mortar containing nanoparticles.
The aim of this study is to research the effect of adding nanoparticles to cement mortar and to find optimized percentage of adding nanoparticles and also finding mechanism to improve the mechanical properties of cement mortar. MATERIAL AND METHODS Materials and mixture proportions: ASTM C 150 [4] Type Ilportland cement was used.
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Microstructure and Mechanical Properties of Cement/Fly Ash/Natural ...
Abstract: The physical and mechanical properties of Portland cement (PC) - natural rubber latex (NRL) - fly ash (FA) composites have been investigated. The latex per cement ratios that use in this experiment are 0, 5, 7.5 and 10% by weight of cement. Portland cement (PC) was partially replaced with fly ash 0-40% by weight of binder.
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The Influence of Nano-Fe 3 O 4 on the Microstructure and Mechanical ...
The study showed that Fe 3 O 4 nanoparticles acted as a filler which improved the microstructure of a cementitious composite and reduced its total porosity, thus increasing the density of the composite. The presence of nanomagnetite did not affect the main hydration products and the rate of cement hydration.
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Experimental study on mechanical properties of interfacial transition ...
Correlating the nanomechanical properties of ITZ and microstructure with the compressive strength of RAC, it can be concluded that TSMA can enhance the mechanical properties of RAC by improving the mechanical properties and microstructure of the new ITZ. Keywords Interfacial transition zones Mechanical properties Microstructure Nanoindentation
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Research on strength and microstructure of fibre foamed concrete
Due to the shrinkage cement and load, the foamed concrete cracks, which affects the performance. In order to improve the crack resistance of the foamed concrete, this study added basalt fibre, glass fibre, polyester and wood fibre to the foamed concrete, and tested its mechanical properties and microstructure.
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Mechanical Properties and Microstructure of Graphene-Cement Composites ...
The flexural and compressive strength of cement increased up to 23.5% and 7.5% with 0.05 wt% GP, respectively. FESEM analysis indicated that the microstructure of GP-cement paste was similar to that of control sample without graphene, whereas, a few flower-like crystals were generated in GO-cement paste.
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The Influence of Nano-Fe3O4 on the Microstructure and Mechanical ...
The study showed that 3 wt.% of nano-Fe 3 O 4 in the cementitious composite was the optimal amount to improve both its mechanical and microstructural properties. Background Concrete is the most widely used material in the world. Its primary ingredient, cement, is also the most costly and environmentally unfriendly component in the concrete mix.
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Mechanical properties and microstructure of blended cement containing ...
Cementitious Materials Published: 07 October 2017 Mechanical properties and microstructure of blended cement containing modified quartz tailing Deng Chen, Min Deng, Chengwei Hao, Xianghui Lan & Liwu Mo Journal of Wuhan University of Technology-Mater. Sci. Ed. 32, 1140-1146 ( 2017) Cite this article 91 Accesses 4 Citations Metrics Abstract
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Modeling of the link between microstructure and effective diffusivity ...
The U.S. Department of Energy's Office of Scientific and Technical Information
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Mechanical Properties of Lightweight Foamed Concrete Modified with ...
The mechanism by which the MNP addition in LFC improves the pore structure of cement matrix was evenly scattered in LFC, and each particle is enclosed in a cube pattern; thus, the gap between MNP can be revealed [ 45 ]. Once the hydration commences, hydrate products are disseminated and encase MNP as kernels.
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Mechanical properties and microstructure of ultra-high-performance ...
Jun 13, 2022Ultra-high-performance concrete (UHPC), in virtue of its excellent mechanical properties and durability, has become a research hotspot in the field of civil engineering materials. In general, the compressive strength of UHPC is higher than 120 MPa, and its elastic modulus is in the range of 40-60 GPa [1].
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Relationship Between Microstructure and Mechanical Properties of Paste ...
Experimental study of the interfacial zone between aggregate and cement paste was undertaken. The study adapted a newly developed pushout method. A closed loop . Search.
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[PDF] Assessing Mechanical Properties and Microstructure of Fire ...
The fire-resistant behavior of this specialized concrete, however, has not yet been studied as extensively. ... This investigation develops important data on the mechanical properties and microstructure of ECC exposed to temperatures up to 800°C (1472°F). In this study, the mechanical properties (residual compressive strength, stress-strain ...
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Microstructure characterization of cement paste from micro-CT and ...
Microstructure characterization of cement paste from micro-CT and correlations with mechanical properties evaluated from virtual and real experiments. / Kim, Ji Su; Kim, Jong Hak; Han, Tong Seok. In: Materials Characterization, Vol. 155, 109807, 09.2019. Research output: Contribution to journal › Article › peer-review
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Mechanical properties and microstructure of reactive powder concrete ...
Reactive powder concrete samples with different MWCNTs content were prepared, and their mechanical performance and microstructure were also evaluated. The results show that the synergistic effect, provided by anionic SDBS and nonionic PVP, is effective to achieve stable dispersion of MWCNTs.
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