水化热抑制剂对大体积混凝土性能的影响研究
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摘要
将两种不同品种水化热抑制剂用于大体积混凝土中,模拟研究实际生产中不同掺量的水化热抑制剂对大体积混凝土绝热温升、最高温度、力学性能及工作性能的影响,结果表明与空白试件对比,两种水化热抑制剂不同掺量条件下都能在一定程度上降低混凝土的绝热温升,对大体积混凝土的内部最高温度及裂缝控制起积极作用;随水化热抑制剂掺量增加,早期强度对比空白样品偏低,但28d及60d强度稍有增长。
In this paper, two different types of hydration heat inhibitors are used in mass concrete.The effects of different dosage of hydration heat inhibitors on adiabatic temperature rise, maximum temperature,mechanical property and performance of mass concrete are simulated. The results showed:compared with blank test, under the condition of different proportion of two kinds of heat of hydration inhibitors are to a certain extent reduce the adiabatic temperature rise of concrete, the highest temperature in mass concrete and the crack control played a positive role; in terms of mechanical properties, with the addition of hydration heat inhibitor, the early strength compared with the blank sample was low,but the 28 d strength and 60 d strength were slightly increased.
In this paper, two different types of hydration heat inhibitors are used in mass concrete.The effects of different dosage of hydration heat inhibitors on adiabatic temperature rise, maximum temperature,mechanical property and performance of mass concrete are simulated. The results showed:compared with blank test, under the condition of different proportion of two kinds of heat of hydration inhibitors are to a certain extent reduce the adiabatic temperature rise of concrete, the highest temperature in mass concrete and the crack control played a positive role; in terms of mechanical properties, with the addition of hydration heat inhibitor, the early strength compared with the blank sample was low,but the 28 d strength and 60 d strength were slightly increased.
引文
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[6]贾福杰,张加奇,聂风义,等.水化热抑制型膨胀剂HCSA-R在工程中的应用[J].膨胀剂与膨胀混凝土,2013(1):5-8.
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[2]江昔平,王社良,段述信,等.基于降低成本的大体积混凝土配合比优化设计研究[J].混凝土,2008(4):70-74.
[3]王滋元.大体积混凝土结构水泥品种选择研究[D].大连:大连理工大学,2015.
[4]张晓果,杨进波,刘虎.水化热抑制剂对大体积混凝土性能影响的研究[J].商品混凝土,2017(5):33-35.
[5]日本电气化学工业株式会社,“电气”CSA100R[J].膨胀剂与膨胀混凝土,2008(4):16-24.
[6]贾福杰,张加奇,聂风义,等.水化热抑制型膨胀剂HCSA-R在工程中的应用[J].膨胀剂与膨胀混凝土,2013(1):5-8.
[7]赵顺增,刘立,抑制水化热型混凝土膨胀剂HCSA-R的性能[J].膨胀剂与膨胀混凝土,2010(2):7-9.