Characteristics analysis of self-luminescent cement-based composite materials with self-cleaning effect

He, Bei Hai; Gao, Yingli; Qu, Liangchen; Duan, Kairui; Zhou, Wenjuan; Pei, Ganpeng

doi:10.1016/j.jclepro.2019.03.291

Cited by 97 publications

(26 citation statements)

References 41 publications

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“…Slag powder consisted of irregular particles with similar shapes as cement particles, but the powder had a large surface area. After incorporation, the adsorption of PCE in paste was increased by the slag, 46 the concentration of PCE molecules adsorbed on the cement particles decreased, the particles became relatively different to slip and flowability was decreased. Fly ash consisted of multiporous spherical particles with a fluffy structure that enabled strong adsorption.…”

Section: Resultsmentioning

confidence: 99%

Synthesis and characteristics of pectiniform polyurethane‐modified polycarboxylate and its effects on behavior of cement paste

Xiang

Gao

2020

J of Applied Polymer Sci

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In this research, two kinds of polycarboxylate (M-PCE and O-PCE) with the same degree of polymerization in side chains but different main chains were synthesized via a radical polymerization reaction at room temperature. Along with two commercial polycarboxylates (C-PCE-1 and C-PCE-2), their properties on adsorption, hydration, zeta potential, liquid surface tension, and flowability of cement pastes were investigated. The results showed that the adsorption of M-PCE on the surface of cement particles increased 14.1% and the adsorption rate increased 24% compared with C-PCEs. Furthermore, three polycarboxylates (O-PCE, C-PCE-1, and C-PCE-2) exhibited a delayed effect on the hydration of cement due to the shielding effect of their chain alkyl groups, meanwhile the hydration of the cementitious materials by the M-PCE was not delayed but promoted because of its incomplete hydrolysis of the siloxane. As a result of the higher adsorption amount, M-PCE with siloxane groups exhibited favorable effects in terms of zeta potential, liquid surface tension, and flowability of cement pastes.

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Section: Resultsmentioning

confidence: 99%

Synthesis and characteristics of pectiniform polyurethane‐modified polycarboxylate and its effects on behavior of cement paste

Xiang

Gao

2020

J of Applied Polymer Sci

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“…After curing in saturated lime water for 7, 28 and 56 days, respectively, the time that pulse passed through the specimens was recorded as T 2 . The damage parameter (D) was estimated by Equations (6) and (7); the damage parameter after loading was D f , and the damage parameter after healing was D h [39][40][41]. When the damage parameter decreased to a negative value (D < 0), a higher pulse velocity than that of the intact specimens was indicated.…”

Section: Active Aementioning

confidence: 99%

Preparation and Characterization of Self-Healing Mortar Based on “Build-In” Carbonation

Wang

Jiang

2020

Materials

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In this study, a new type of cement-based healing pellets (CHPs) were proposed to accelerate the healing efficiency of concrete, which was mainly based on the introduced Na2CO3 on promoting the formation of calcium carbonate (CaCO3) in cracks. The effects of Na2CO3 on the characteristics of CHPs were firstly investigated, and then the properties of cement mortar mixed with CHPs were studied quantitatively, including the workability, mechanical properties and healing ability. The results showed that higher dosages of Na2CO3 in CHPs decreased the size range of pellets and reduced the setting time, fluidity and heat of hydration of mortar. Still more, CHPs reduced the early strength of mortar but kept the intensity growth rate stable such that it had nearly no negative effect on the later strength. With the content of CHPs increasing, the strength of mortar showed a decreasing trend, while the pore-filling efficiency and strength healing rate of mortar were further improved. In addition, as a new type of self-healing pellets for concrete based on the “build-in” carbonation, CHPs improved the strength and healing effectiveness of cement mortar. When the dosage of Na2CO3 in CHPs and the content of CHPs in mortar were at 10% and 25%, respectively, mortar obtained highest strength in the later stage and the best healing effect.

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“…Reinforced concrete is the main construction building material which has been used for many years due to its economy and practicality [1][2][3]. Nevertheless, reinforced concrete is usually exposed to various environments when in service.…”

Section: Introductionmentioning

confidence: 99%

Research on the Influence of Carbonation on the Content and State of Chloride Ions and the Following Corrosion Resistance of Steel Bars in Cement Paste

Wang

Zhang

et al. 2020

Coatings

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In this paper, the changes of free chloride ion concentration and bound chloride concentration in cement paste with different total and proportion of mineral admixtures under carbonation were studied. Moreover, the following corrosion resistance of steel bars buried in cement paste under carbonation was researched by testing the electrical resistance and alternating current (AC) impedance spectroscopy of reinforced cement paste. Results indicated that fly ash and granulated blast furnace slag powder with the content less than 20% by mass ratio of total binder hindered the solidification of chloride ions in cement-based materials, and blast furnace slag powder with the content higher than 20% promoted the solidification of chloride ions in cement paste. The carbonation effect was able to decrease the amount of solidified chloride ion and increase the amount of free chloride ions leading to accelerating the corrosion of reinforcement. Meanwhile, the blast furnace slag powder with the content higher than 20% could effectively promote the corrosion resistance of steel bars.

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Characteristics analysis of self-luminescent cement-based composite materials with self-cleaning effect

Cited by 97 publications

References 41 publications

Synthesis and characteristics of pectiniform polyurethane‐modified polycarboxylate and its effects on behavior of cement paste

Synthesis and characteristics of pectiniform polyurethane‐modified polycarboxylate and its effects on behavior of cement paste

Preparation and Characterization of Self-Healing Mortar Based on “Build-In” Carbonation

Research on the Influence of Carbonation on the Content and State of Chloride Ions and the Following Corrosion Resistance of Steel Bars in Cement Paste

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