Macro- and Micro-Analysis of Factors Influencing the Performance of Sustained-Release Foamed Cement Materials
Yijun Chen, Shengyu Wang, Yu Zhao, Pan Guo, Lei Zhang, Yingchun Cai, Jiandong Wei, Heng Liu
TL;DR
This study improves the performance of foamed cement for road repairs by analyzing factors that affect its expansion, strength, and toughness.
Contribution
The paper introduces a novel titanium silicate coupling agent coating technique to delay foaming and optimize material properties.
Findings
The addition of heavy calcium powder and calcium chloride significantly enhances early compressive strength.
Latex powder and polypropylene fiber improve the flexural strength and toughness of the cement.
SEM and pore structure analysis reveal how additives influence the microstructure and performance of the material.
Abstract
This paper addresses the issues of insufficient expansion force, low early strength (1-day compressive strength < 1.5 MPa), and poor toughness (flexural strength < 0.8 MPa) in traditional chemical foamed cement used for road grouting repair. By combining single-factor gradient experiments with microscopic mechanism analysis, the study systematically investigates the performance modulation mechanisms of controlled-release foamed cement using additives such as heavy calcium powder (0–20%), calcium chloride (0.2–1.2%), latex powder (0.2–1.2%), and polypropylene fiber (0.2–0.8%). The study innovatively employs a titanium silicate coupling agent coating technique (with the coating agent amounting to 25% of the catalyst’s mass) to delay foaming by 40 s. Scanning electron microscopy (SEM) and pore structure analysis reveal the microscopic essence of material performance optimization.
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Taxonomy
TopicsGrouting, Rheology, and Soil Mechanics · Concrete and Cement Materials Research · Microbial Applications in Construction Materials