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- 混凝土与制品
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大体积防辐射混凝土的试验研究及工程应用
作者：权伟博1，麻鹏飞2
（1.四川华西绿舍精城建材有限公司，四川 内江 641000，2.四川华西绿舍建材有限公司，四川 成都 610051）
摘要：基于成都市某医院住院综合楼工程，该工程室内放置直线加速器，要求结构不得有裂缝出现，结构混凝土为大体积防辐射混凝土，原材料选择标准及配合比设计要符合实际工程应用，通过热工计算验证配合比的合理性，实际养护根据测温和热工计算结果采取措施。试验中，采用缓凝减水剂+掺合料技术，再通过有效保温措施起到了控制混凝土内外温差的目的，有效减小了温度应力，防止混凝土出现温度裂缝。工程应用效果良好，通过监测混凝土内外温差在10 ℃以内，混凝土表层与大气温差在20 ℃以内。
关键词：大体积；混凝土；防辐射；温度控制
中图分类号：TU528.35 文献标识码：A 文章编号：1001-702X（2019）01-0029-04
Experimental research and application of large volume anti-radiation concrete
QUAN Weibo1，MA Pengfei2
（1.Sichuan Huashi Green Home Jingcheng Land Building Materials Co. Ltd.，Neijiang 641000，China；
2.Sichuan Huashi Green Home Land Building Materials Co. Ltd.，Chengdu 610051，China）
Abstract：Based on the residential complex project of a hospital in Chengdu，a linear accelerator is placed inside the project，there should be no cracks in the structure，structural concrete is large volume of radiation resistant concrete. The selection criteria of raw materials and the design of the mixture ratio should meet the practical engineering application，the rationality of the matching ratio is verified by thermal calculation. The actual curing measures are taken according to the calculation results of the temperature measurement. In the experiment，the retarding water reducer and admixture technology were used，and the purpose of controlling the temperature difference between inner and outer concrete is achieved through effective insulation measures，the temperature stress is reduced effectively and the temperature crack in concrete is prevented. The effect of engineering application is good，through monitoring，the temperature difference inside and outside of concrete is within 10 ℃，and the temperature difference between surface of concrete and the atmosphere temperature is within 20 ℃.
Key words：large volume，concrete，anti-radiation，temperature control