对新拌水泥浆中夹带的二氧化碳气泡的自消泡效应的新认识

IF 10.9 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Cement and Concrete Research Pub Date : 2025-02-03 DOI:10.1016/j.cemconres.2025.107815

Suhui Zhang , Min Liu , Keren Zheng , Lou Chen , Caijun Shi , Qiang Yuan

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New insight into self-antifoaming effect of entrained CO2 bubbles in fresh cement paste

A new insight into self-antifoaming effect of CO₂ bubble was proposed by exploring the evolution of entrained CO₂ bubbles in fresh cement paste. The disappearance process of CO₂ bubbles was observed, resulting in the reduction of air content. The evolution of CO₂ bubbles eventually formed two kinds of pore structures: hollow spherical shell structure (HSS) and interior filled spherical shell structure (IFSS). It was evidenced by the rich area of CaCO₃ at the outline of CO₂ bubble and the interior formation of hydration products. Meanwhile, self-antifoaming effect of CO₂ bubble promoted the microstructural build-up of fresh cement paste and enhanced the mechanical property of hardened cement paste. Fresh cement paste with CO₂ bubbles had stronger elasticity and higher volume resistance, corresponding to the faster rise of storage modulus. The compressive strength of hardened cement paste was increased from 29.6 MPa to 37.3 MPa with a porosity reduction of 6%.

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来源期刊

Cement and Concrete Research 工程技术-材料科学：综合

CiteScore

20.90

自引率

12.30%

发文量

318

审稿时长

53 days

期刊介绍： Cement and Concrete Research is dedicated to publishing top-notch research on the materials science and engineering of cement, cement composites, mortars, concrete, and related materials incorporating cement or other mineral binders. The journal prioritizes reporting significant findings in research on the properties and performance of cementitious materials. It also covers novel experimental techniques, the latest analytical and modeling methods, examination and diagnosis of actual cement and concrete structures, and the exploration of potential improvements in materials.