Research Status of Low Temperature Early Strength Agents for Concrete
ZHANG Feng1,2, BAI Yin1,2, CAI Yuebo1,2, DU Jiegui3, NING Fengwei1,2
1 Nanjing Hydraulic Research Institute, Nanjing 210029; 2 State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Nanjing 210024; 3 Construction Headquarters of Dashanbao Arterial Road in Yunnan Province, Zhaotong 657000
Abstract: In winter construction or concrete engineering with early strength requirements, early strength agent plays an important role in speeding up the construction schedule and improving the quality of concrete, and its content is generally not more than 5% of the mass of cement. At present, the traditional early strength components are unable to meet the requirements of green and high performance concrete. Most of the previous studies about early strength agent are conducted at room temperature, while the research of early strength agent in low temperature environment (especially 5 ℃) is relatively insufficient, and low temperature early strength effect is relatively limited, the mechanism of low temperature early strength is also not clear. With the further development of engineering construction, it is an important research direction to develop low temperature early strength agent which meets the requirements of low temperature early strength and good workability. Based on the classification summary of the performance characteristics, existing problems and action mechanisms of the common early strength components, this paper introduces the research and application of early strength agent in low temperature, and also point out the development direction of low temperature early strength agent.
张丰, 白银, 蔡跃波, 杜杰贵, 宁逢伟. 混凝土低温早强剂研究现状*[J]. 《材料导报》期刊社, 2017, 31(21): 106-113.
ZHANG Feng, BAI Yin, CAI Yuebo, DU Jiegui, NING Fengwei. Research Status of Low Temperature Early Strength Agents for Concrete. Materials Reports, 2017, 31(21): 106-113.
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