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Cement and Concrete Composites - Academic Commons

Cement and Concrete Composites 77 (2017) 60e67. which results in the fluidity loss of their suspension. From this perspective, the total surface area of the cement particles conse-quently increases with increasing pumping pressure and leaves the mix with an insufficient high-range water-reducing admixture

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Cement and Concrete Composites - Academic Commons

Experiments and micromechanical modeling of electrical conductivity of carbon nanotube/cement composites with moisture Sung-Hwan Jang a, b, Daniel Peter Hochstein a, c, Shiho Kawashima a, Huiming Yin a, * a Department of Civil Engineering and Engineering Mechanics, Columbia University, 610 Seeley W. Mudd 500 West 120th Street, New York, NY 10027, USA b Robotics Institute, School of Computer ...

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Cement and Concrete Composites - Academic Commons

Cement and Concrete Composites 86 (2018) 288e296. It could be reasoned that because of thixotropy there should be more than one state of flocculation or microstructure when yield stress is measured, depending on the flow history of the material.

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Cement Concrete Composites - Academic Commons

S. Kawashima et al./Cement Concrete Composites 36 (2013) 8–15 9. soaked in acetone to stop hydration and dried at 80 C for 2 h. Then the sample was coated with 20 nm of gold to make it conduc-tive. The accelerating voltage and current were 15–20 kV and 10–20 lA, respectively. The upper detector was used to

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Cement Concrete Composites - Academic Commons

Hou et al./Cement Concrete Composites 35 (2013) 12–22 13. 2.2. Mixture proportions Three dosages of CNS addition (0%, 2.25% and 5% (solid state) by mass of binder) and three levels of cement replacement with fly ash (20%, 40%, and 60% by mass) were used. Water to binder (w/

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Cement and Concrete Composites Journal ScienceDirect ...

About the journal. Formerly known as International Journal of Cement Composites and Lightweight Concrete; This journal is designed to reflect current developments and advances being made in the general field of cement-concrete composites technology and in the production, use, and performance of cement-based construction materials.

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Cement Concrete Composites - Academic Commons

S. Kawashima et al./Cement Concrete Composites 36 (2013) 8–15 9. soaked in acetone to stop hydration and dried at 80 C for 2 h. Then the sample was coated with 20 nm of gold to make it conduc-tive. The accelerating voltage and current were 15–20 kV and 10–20 lA, respectively. The upper detector was used to

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Cement Concrete Composites - Academic Commons

1096 P. Hou et al./Cement Concrete Composites 34 (2012) 1095–1103. 2.3. Test methods 2.3.1. Compressive strength The compressive strength of the mortars were measured based on ASTM C109 [27] using a 4448kN MTS hydraulic test machine. For each mix at each age, three 5 cm (diameter) 10 cm (length)

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Cement and Concrete Composites O

C. Herrera-Mesen et al. Cement and Concrete Composites xxx (2018) xxx-xxx An exp eri m ent al prog ram was cond ucted with sprayed pastes and mort ars prod uced with one type of cem ent, two types of acc ele ra t or and three diff ere nt sulf ate cont ents. Powd er X-ray diff ract ion (XRD),

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Cement and Concrete Composites - Academic Accelerator

The ranking percentile of Cement and Concrete Composites is around 90% in the field of General Materials Science. Cement and Concrete Composites Key Factor Analysis. In the Building and Construction research field, the Quartile of Cement and Concrete Composites is Q1. Cement and Concrete Composites has been ranked #6 over 174 related ...

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Cement and Concrete Composites - academic-accelerator

In addition to novel aspects of conventional concrete materials, the journal covers a wide range of composite materials such as fiber-reinforced cement composites, polymer cement composites, polymer impregnated composites, ferrocement, and cement composites containing special aggregate inclusions or

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The Characteristics of CNT/Cement Composites with Acid ...

Jul 27, 2015  This study investigated the effects of acid-treated MWCNTs on the workability, compressive and tensile strength, porosity, and microstructure of CNT/cement composites. While workability decreased with acid treatment of CNTs, compressive and tensile strength improved significantly. Strength was also enhanced by using acid-treated CNTs alone, compared to using a surfactant with acid-treated CNTs.

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Cement and Concrete Research - Journal - Elsevier

The aim of Cement and Concrete Research is to publish the best research on the materials science and engineering of cement, cement composites, mortars, concrete and other allied materials that incorporate cement or other mineral binders. In doing so, the journal will focus on reporting major results of research on the properties and performance of cementitious materials; novel experimental ...

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Damage Detection of Carbon Nanotube Cementitious ...

Appl. Sci. 2021, 11, 2955 2 of 20 Studies on cement composites mixed with CNTs with mechanical, electrical, and thermal properties have been conducted to enhance the strength, electrical conductivity,

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Microstructure Change of Nanosilica–Cement Composites ...

May 14, 2020  The deterioration of cement composites containing nanosilica partially exposed to sulfate attack was studied, and the microstructure change of the composites was analysed by a scanning electron microscope (SEM), energy dispersive spectroscopy (EDS) and X-ray diffraction (XRD). The results showed that nanosilica–cement composites had better sulfate resistance compared to plain cement ...

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Investigating High Energy Mixing in Cement-based Materials

Investigating High Energy Mixing in Cement-based Materials Aileen Vandenberg, Ph.D. University of Connecticut, 2018 One of the current challenges to nano-engineering cementitious composite materials is obtaining properly dispersed nano-sized particles in the cementitious composite matrix. Properly dispersed

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Cement-Based Piezoelectric Ceramic Composites for Sensing ...

May 07, 2021  The acoustic velocities of piezoelectric ceramic, cement, and plain concrete are similar, while the density of piezoelectric ceramic is much higher, resulting in the acoustic impedance mismatching problem. The piezoelectric composite is an alternative approach to address this issue. In 2002, cement-based piezoelectric composites (CPCs),

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Natural Cellulose Nanofibers As Sustainable Enhancers in ...

Dec 22, 2016  Introduction. Cement composite is one of the mostly used construction materials, but the use of cement based material in dams and long-span bridges is limited due to its brittleness [1–3].Although a variety of fibers have been added into cement composites to improve their tensile strength, toughness, and energy absorption capacity [4–7], these fibers are limited for poor interface, low ...

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Cover Letter Cement And Concrete Composites

Essay Help Online Service ’ Order an essay online Cover Letter Cement And Concrete Composites from TFTH and get it done by experts and see the difference for yourself. I was shocked when I received my first assignment essay from TFTH as it was Cover Letter Cement And Concrete Composites impeccable and totally up to my expectation. Who could have thought that a gem like TFTH was also ...

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Cement-Wood Composites: Effects of Wood Species, Particle ...

Jun 01, 2016  The aim of this research was to investigate the effects of wood species, particle treatments and mix proportion on the physical (density) and mechanical (compressive strength and dynamicmodulus of elasticity) properties of cement-wood composites. Different mix proportions were investigated, based on the cement: wood ratio of 0.3:0.7, in volume, with Pinus elliottii and Eucalyptus ...

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Guide for authors - Cement and Concrete Composites - ISSN ...

In addition to novel aspects of conventional concrete materials, the journal covers a wide range of composite materials such as fiber-reinforced cement composites, polymer cement composites, polymer impregnated composites, ferrocement, and cement composites containing special aggregate inclusions or

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Digital Commons - UNL Institutional Repository

Fiber-reinforced cementitious composites differ according to the type of cementitious matrix employed to bind the reinforcing fibers: concrete, mortar, or cement paste. In order of increasing complexity: a cement paste is a mixture of cement and water, a mortar is a mixture of cement, water, lime, and fine

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MgO-Based Cementitious Composites for Sustainable and ...

MgO-Based Cementitious Composites for Sustainable and ... Academic Editor: Marc A. Rosen Received: 6 June 2021 ... Concrete made with Portland cement is by far the most heavily used construction ...

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Academic Journals - Journal of Civil Engineering and ...

Coconut fibres reinforced composites have been used as cheap and durable non-structural elements. The aim of this review is to spread awareness of coconut fibres as a construction material in civil engineering. Key words: Coconut fibres, construction material, composites, cement and concrete.

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The Characteristics of CNT/Cement Composites with Acid ...

Jul 27, 2015  This study investigated the effects of acid-treated MWCNTs on the workability, compressive and tensile strength, porosity, and microstructure of CNT/cement composites. While workability decreased with acid treatment of CNTs, compressive and tensile strength improved significantly. Strength was also enhanced by using acid-treated CNTs alone, compared to using a surfactant with acid-treated CNTs.

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Natural Cellulose Nanofibers As Sustainable Enhancers in ...

Dec 22, 2016  Introduction. Cement composite is one of the mostly used construction materials, but the use of cement based material in dams and long-span bridges is limited due to its brittleness [1–3].Although a variety of fibers have been added into cement composites to improve their tensile strength, toughness, and energy absorption capacity [4–7], these fibers are limited for poor interface, low ...

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Microstructure Change of Nanosilica–Cement Composites ...

May 14, 2020  The deterioration of cement composites containing nanosilica partially exposed to sulfate attack was studied, and the microstructure change of the composites was analysed by a scanning electron microscope (SEM), energy dispersive spectroscopy (EDS) and X-ray diffraction (XRD). The results showed that nanosilica–cement composites had better sulfate resistance compared to plain cement ...

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Silica-based aerogels as aggregates for cement-based ...

Sep 01, 2016  Cement-based mortars were produced with a constant binder/aggregate volumetric ratio of 1/4. Portland cement CEM II/B-32.5 N was used as binder and the aggregate varied from 100% of silica sand (from Areipor) to 100% of aerogel, as indicated in Table 1.The reference render has 100% of silica sand with the particle size distribution from Table 2.

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Achievement of Early Compressive Strength in Concrete ...

Sep 11, 2014  Often it is observed, attainment of early compressive strength in concrete is a challenge. Researchers have tried various admixtures to achieve the objective. This work addresses the issue of achieving early compressive strength in concrete using a bacterium called Sporosarcina pasteurii . The bacterium is characterised with the ability to precipitate calcium carbonate in the presence of any ...

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Prediction of the autogenous shrinkage and microcracking ...

Mar 01, 2021  This study aims to predict the autogenous shrinkage of alkali-activated concrete (AAC) based on slag and fly ash. A variety of analytical and numerical models are available for the prediction of autogenous shrinkage of ordinary Portland cement (OPC) concrete, but these models are found to show dramatic discrepancies when applied for AAC due to the different behaviours of these two systems.

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Reinforcing graphene oxide/cement composite with NH2 ...

Jul 20, 2016  In this study, pure and NH2-functionalized graphene oxide (GO) nanosheets have been added to the cement mortar with different weight percents (0.05, 0.10, 0.15, 0.20 and 0.25 wt%). In addition, the effects of functionalizing GO on the microstructure and mechanical properties (flexural/compressive strengths) of cement composite have been investigated for the first time. Scanning electron ...

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Cement-Based Piezoelectric Ceramic Composites for Sensing ...

May 07, 2021  The acoustic velocities of piezoelectric ceramic, cement, and plain concrete are similar, while the density of piezoelectric ceramic is much higher, resulting in the acoustic impedance mismatching problem. The piezoelectric composite is an alternative approach to address this issue. In 2002, cement-based piezoelectric composites (CPCs),

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Effects of Recycled Fine Aggregates and Inorganic ...

replacement of natural aggregates by weight) were used in the same cement-based composites. The results indicated that all specimens had a high total charge-passed value, and inorganic crystalline material C provided superior protection for green cement-based composites.

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Self-Sensing Cementitious Composites: Review and Perspective

concrete, which could not be previously achieved by other fillers. All these conducting components provide a path for the current to travel along with the cement matrix, thus forming an electrical network [18]. When the cement composite is subjected to some load,

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