Effects of pre-soaked zeolite and CaO-based expansive agent on mechanical properties and autogenous deformation of early-age concrete

Zhao, Haitao; Li, Jinghao; Sun, Gaoyang; Jiang, Jianhua; Xuan, Weihong; Chen, Yuzhi; Tian, Qinghua; Liu, Jiaping

doi:10.1016/j.conbuildmat.2020.120370

Cited by 30 publications

(5 citation statements)

References 39 publications

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“…As the trends were opposite for both modification groups, combining them resulted in 38.7 GPa Young modulus of final brick (M20). The presented results show similarities to Zhao et al 36 study as they presented a drop in the Young modulus from 39.8 GPa to 37.0 GPa after adding 15% of zeolite to the concrete mix.…”

Section: Materials Properties Of Fresh Mixturessupporting

confidence: 88%

“…Only mixes with cement substitutes had extended initial and setting time, which was a result of partly replacing cement with the no-traditional binder (zeolite, metakaolinite, and micrometakaolinite). Małek et al 18 and Zhao et al 36 came to the same conclusions, reporting no effect on the initial and final setting times of concrete mortars after fiber modifications and extended time after zeolite modification. ), showed a density of 2,320.3 kg/m 3 .…”

Section: Materials Properties Of Fresh Mixturesmentioning

confidence: 66%

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A multi-site study of a new cement composite brick with partial cement substitutes and waste materials

Jackowski

Małek

2023

Case Studies in Construction Materials

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Section: Materials Properties Of Fresh Mixturessupporting

confidence: 88%

Section: Materials Properties Of Fresh Mixturesmentioning

confidence: 66%

A multi-site study of a new cement composite brick with partial cement substitutes and waste materials

Jackowski

Małek

2023

Case Studies in Construction Materials

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“…Zhao Haitao [18] studied the effect of the combined use of CaO expansive agent and zeolite on the mechanical properties and autogenous shrinkage of cementitious materials. The experimental results show that the addition of zeolite has a negative effect on the mechanical properties of HPC, but the combined use of expansive agent and zeolite has a significant synergistic effect on the autogenous shrinkage of concrete.…”

Section: Research Status Of Multi-regulation On Volume Deformation Of...mentioning

confidence: 99%

Review of Research on Volume Shrinkage Regulation Mechanism of Ultra-high Performance Concrete

Yan

2024

AJST

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Ultra-high performance concrete (UHPC) is a cement-based composite building material with excellent durability and mechanical properties, but its autogenous shrinkage and drying shrinkage phenomenon have become a common problem in practical engineering. In order to solve this practical problem, new mineral admixtures and admixtures are usually added to UHPC, and the shrinkage of UHPC is effectively improved.

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“…It is also found, however, that the compressive strength increases and subsequently decreases with increasing EXP content after 28-day curing. This is because a high EXP content in RAC could result in an excessive expansion pressure, which causes the microcracks and is harmful to the pore structure [47]. The concrete mixes after 28-day curing are compared through microscopic observation as shown in Fig.…”

Section: Compressive Strengthmentioning

confidence: 99%

Mechanical and Environmental Evaluation of Concrete Mix Using Aggregates Recycled from Construction and Demolition Waste

Luo¹,

Jiang²,

Chang³

et al. 2022

Pol. J. Environ. Stud.

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Construction and demolition waste (CDW) has begun to take its toll on the environment. One option to mitigate the negative influence is to utilize CDW as recycled aggregate (RA) in concrete production. Recycled aggregate concrete (RAC) mixtures prepared by replacing natural aggregate (NA) with RA, with expansive agent (EXP) and polypropylene fiber (PPF) as additives, have been cast to study their mechanical properties and environmental impact. The results of compressive strength testing reveal that both additives, EXP and PPF, have positive effects on the mechanical properties. The microscopic analysis shows that the hydration reaction of EXP generates ettringite crystals which fill the internal pores of the concrete and increase the compactness of the concrete. Fiber can significantly improve the bonding between cement paste and aggregates, thus enhancing the deformation resistance of concrete. Environmental analysis shows that the leaching amount of heavy metals is very limited which is within 11.67% of the required value in China standard, and carbon emission of concrete with RA as aggregates and fly ash as low-carbon binder is lower than that of concrete without RA. The use of CDW recycled aggregates may significantly mitigate the environmental impact and improve the sustainability during concrete production.

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Effects of pre-soaked zeolite and CaO-based expansive agent on mechanical properties and autogenous deformation of early-age concrete

Cited by 30 publications

References 39 publications

A multi-site study of a new cement composite brick with partial cement substitutes and waste materials

A multi-site study of a new cement composite brick with partial cement substitutes and waste materials

Review of Research on Volume Shrinkage Regulation Mechanism of Ultra-high Performance Concrete

Mechanical and Environmental Evaluation of Concrete Mix Using Aggregates Recycled from Construction and Demolition Waste

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