高温下高性能混凝土早期抗裂性能试验研究
发布时间：2018-11-03 20:01
【摘要】：为了研究高地热条件下隧洞衬砌混凝土的早期抗裂性,使用刀口法研究温度、水胶比和粉煤灰掺量对高性能混凝土早期抗裂性的影响。试验结果表明:温度是影响混凝土早期抗裂性的主要因素,粉煤灰掺量次之,水胶比的影响可以忽略;混凝土早期抗裂性随温度的升高而降低,随粉煤灰掺量的增加先降低后升高,试验确定的最优粉煤灰掺量为20%;在高温条件下,粉煤灰混凝土的早期抗裂性优于普通硅酸盐混凝土的,能在提高混凝土早期抗裂性的同时降低工程造价。
[Abstract]:In order to study the early crack resistance of tunnel lining concrete under high geothermal conditions, the effect of temperature, water / binder ratio and fly ash content on early crack resistance of high performance concrete was studied by cutting edge method. The test results show that temperature is the main factor affecting the early crack resistance of concrete, the content of fly ash is the second, and the effect of water-binder ratio can be neglected. The early crack resistance of concrete decreases with the increase of temperature, and then increases with the increase of the content of fly ash. The optimum content of fly ash determined by test is 20%. Under the condition of high temperature, the early crack resistance of fly ash concrete is better than that of ordinary silicate concrete, which can improve the early crack resistance of concrete and reduce the engineering cost.
【作者单位】： 新疆农业大学水利与土木工程学院;中国国电集团库尔勒分公司;
【基金】：新疆科技支撑计划项目(201233132) 新疆水利水电工程重点学科基金资助项目(XJzdxk-2010-02-12)
【分类号】：TV544
本文编号：2308861
[Abstract]:In order to study the early crack resistance of tunnel lining concrete under high geothermal conditions, the effect of temperature, water / binder ratio and fly ash content on early crack resistance of high performance concrete was studied by cutting edge method. The test results show that temperature is the main factor affecting the early crack resistance of concrete, the content of fly ash is the second, and the effect of water-binder ratio can be neglected. The early crack resistance of concrete decreases with the increase of temperature, and then increases with the increase of the content of fly ash. The optimum content of fly ash determined by test is 20%. Under the condition of high temperature, the early crack resistance of fly ash concrete is better than that of ordinary silicate concrete, which can improve the early crack resistance of concrete and reduce the engineering cost.
【作者单位】： 新疆农业大学水利与土木工程学院;中国国电集团库尔勒分公司;
【基金】：新疆科技支撑计划项目(201233132) 新疆水利水电工程重点学科基金资助项目(XJzdxk-2010-02-12)
【分类号】：TV544
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