Research on the chemical mechanism in the polyacrylate latex modified cement system

Wang, Min; Wang, Rumin; Zheng, Shao-Fei; Farhan, Shameel; Yao, Hao; Jiang, Hao

doi:10.1016/j.cemconres.2015.05.008

Cited by 115 publications

(25 citation statements)

References 21 publications

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“…The hydration degree of CSA cement is caught up by that of polymer-modified CSA cement when hydration time comes to 2 h. The effect of polymer dispersions on the hydration of CSA cement can be divided into two stages based on above results: the very early retardation period and later acceleration period. The incorporation of polymer dispersions prolongs the setting time of CSA cement paste (Table 4) due to its initial retardation effect on CSA cement hydration, which is well consistent with previous studies for polymer-modified Portland cement [20,23,25,27,29]. The calorimetry measurement is very suitable to be employed to monitor the initial hydration of CSA cement modified with polymer dispersions.…”

Section: Hydration Processsupporting

confidence: 87%

“…The effect of polymer dispersions on the hydration of Portland cement has been well disclosed from previous studies [13][14][15][16][17][18][19][20]. Generally, the addition of polymer dispersions would retard the hydration of ordinary Portland cement (OPC) [20][21][22][23][24][25][26][27][28][29][30], and this retardation effect becomes much more significant when the bigger polymer content was dosed [31,32]. It has been widely accepted that its retardation effect is mainly attributed to their adsorption onto the surface of the cement grains and their complexing effects with Ca 2?…”

Section: Introductionmentioning

confidence: 99%

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Rejuvenation, embryonic shear bands and improved tensile plasticity of metallic glasses by nanosecond laser shock wave

Yan

Zhang

et al. 2019

Journal of Non-Crystalline Solids

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The influence of three polymer dispersions [styrene-butadiene copolymer (SB), styrene-acrylic ester copolymer (SA) and polyacrylic ester (PA)] on the hydration of calcium sulfoaluminate (CSA) cement within 72 h was investigated by using isothermal conduction calorimetry, X-ray diffraction analysis and thermal gravimetric analysis. The results indicate that these three polymer dispersions perform different influences on the hydration heat flow of CSA cement during different periods, they all postpone the occurrence time of the maxima peaks, and its extent is mainly dependent on the addition amount. Polymer dispersions manifest great retardation on the initial hydration of CSA cement, and the effect is much more significant within 1 h. In this stage, the generation of ettringite is strongly delayed; however, the formation of ettringite is accelerated by these polymer dispersions at and after 2 h. Among these three polymer dispersions, PA demonstrates the highest acceleration effect on the hydration degree.

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Section: Hydration Processsupporting

confidence: 87%

Section: Introductionmentioning

confidence: 99%

Rejuvenation, embryonic shear bands and improved tensile plasticity of metallic glasses by nanosecond laser shock wave

Yan

Zhang

et al. 2019

Journal of Non-Crystalline Solids

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“…Amorphous silica played an important role in the hydration process: (1) it acts as filler, due to its fine particle size, fills the spaces between the cement grains, and (2) it acts as a pozzolanic material due to its ability to react with calcium hydroxide formed during the hydration of OPC leading to the formation of additional amounts of calcium silicate hydrates (C–S–H) with a consequent increase in compressive strength . Many researchers confirmed the interaction between organic polymer latex and the surface of hydrated cement by measuring the zeta potential and the adsorbed amount of polymer on cement during hydration process .…”

Section: Resultsmentioning

confidence: 99%

Effect of waste glass content on the physico‐chemical and mechanical properties of styrene acrylic ester blended cement mortar composites

2016

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This study focuses on the partial substitution effect of ordinary Portland cement (OPC) by different ratios of waste glass powder (5%, 10%, and 20% by weight of cement) on the performance of blended cement mortars. The hardened blended cement mortars were first cured under tap water for different time intervals 3, 7, 28, and 90 days. However, the effect of addition of 10% styrene‐acrylic ester as well as the influence of different doses of gamma rays on the physico‐chemical and mechanical properties of polymer modified blended cement mortar specimens were discussed. Compressive strength, total porosity, and water absorption percentages were measured. The experimental results showed that the physico‐chemical and mechanical properties of blended cement mortars specimens improved as the waste glass content increases up to 20%. In addition, irradiated SAE blended cement mortar composites containing 20% waste glass showed an enhancement in its properties as compared to neat cement (0%WG content) composites. The results were confirmed by X‐ray diffraction, thermogravimetric analysis, and scanning electron microscopy. POLYM. COMPOS., 39:985–996, 2018. © 2016 Society of Plastics Engineers

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“…The slump of concrete matrix having 10% epoxy resin was about 67 mm whereas those of concrete matrices having 10% polyurethane and 0.6% methylcellulose were 7 and 58 mm, respectively. In comparison with normal concrete, polymer-modified concrete also exhibited enhanced durability due to the formation of polymer film and the filling of capillary pores caused by polymer particles that could prevent the penetration of moisture and chloride ions (Wang et al 2006;Wang et al 2015). For all of these reasons, from literature reviews conducted by previous studies (Lee and Kim 2018;Abdel-Mohti et al 2018;Oh et al 2014;Muhammad and Ismail 2012;Lee et al 2017;Li et al 2010), it was found that the mechanical properties and durability of polymer-modified concrete still need further investigations for further applications.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Performance and Durability of Latex-Modified Fiber-Reinforced Concrete

Truong

Son

Choi

2019

ACT

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In this study, the mechanical performance and durability of latex-modified fiber-reinforced concrete were experimentally investigated. For these purposes, various types of tests were carried out: compressive, flexural, restrained drying shrinkage, water-tightness, and freeze and thaw tests. In total, 59 test specimens were manufactured and performed in this study. The latex weight fractions of 10, 15, and 20% and the fiber volume fractions of 0.2 and 0.3% were used as main test parameters. For each fiber volume fraction, amorphous and conventional steel fibers having the same amount were used together. Based on the test results, it was found that the use of 15% latex weight fraction could result in the very early development of concrete compressive strength at the seventh day; the ratio between the concrete compressive strengths at the seventh and 28th days was approximately 91%. The use of a 0.3% fiber volume fraction presented a higher concrete compressive strength at the seventh day than that of a 0.2% fiber volume fraction. In addition, the increase of the latex weight fraction up to 20% increased the flexural strength, and the increase of the fiber volume fraction up to 0.3% also increased the flexural strength. Moreover, using a high amount of latex could delay the crack development time while the final crack width was almost the same. The addition of latex and fibers into the concrete matrix also resulted in excellent resistances of permeability and freeze-thaw cycles.

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Research on the chemical mechanism in the polyacrylate latex modified cement system

Cited by 115 publications

References 21 publications

Rejuvenation, embryonic shear bands and improved tensile plasticity of metallic glasses by nanosecond laser shock wave

Rejuvenation, embryonic shear bands and improved tensile plasticity of metallic glasses by nanosecond laser shock wave

Effect of waste glass content on the physico‐chemical and mechanical properties of styrene acrylic ester blended cement mortar composites

Mechanical Performance and Durability of Latex-Modified Fiber-Reinforced Concrete

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