混凝土低温早强剂研究现状
发布时间:2018-04-12 00:08
本文选题:混凝土 + 早强剂 ; 参考:《材料导报》2017年21期
【摘要】:在冬期施工或有早强要求的混凝土工程中掺早强剂,对加快工程进度、提高混凝土质量等有重要作用,其掺量一般不超过水泥质量的5%。目前传统早强组分已不能满足绿色、高性能混凝土的要求,且之前研究多在常温下进行,而低温(尤其是5℃)环境下的研究相对较少,同时低温早强效果相对有限,低温下的作用机理也不明确。随着工程建设的进一步发展,开发既满足低温早强要求又有良好工作性的低温早强剂是今后的一个重要研究方向。在分类总结各常见早强组分的性能特点、存在问题及作用机理的基础上,介绍了低温条件下早强剂的研究、应用现状,为后续低温早强剂的研制指明方向。
[Abstract]:The addition of early strength agent in winter construction or concrete engineering with early strength requirement plays an important role in speeding up the progress of the project and improving the quality of concrete, and its content is generally not more than 5% of the cement quality.At present, the traditional early strength components can no longer meet the requirements of green and high performance concrete, and most of the previous studies were carried out at room temperature, but at low temperature (especially at 5 鈩,
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