轻烧MgO膨胀剂对水泥浆体变形行为的影响_《混凝土与水泥制品》杂志社

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发布时间：2020-01-06 00:00:00

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轻烧MgO膨胀剂对水泥浆体变形行为的影响

Influences of MgO-based Expansive Agent on the Deformation Behavior of Cement Pastes

２００9年第6期

MgO膨胀剂；膨胀；自收缩；养护制度

MgO-based expansive agent; Expansion； Autogenous shrinkage； Curing regime

２００9年第6期

1000-4637（2009）06-05-04

李文伟1,2，唐明述1，张守治3

1.南京工业大学，210008；2.中国长江三峡工程开发总公司，宜昌 433133； 3.江苏省建筑科学研究院，南京 210008

李文伟1,2，唐明述1，张守治3

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1000

摘要：通过1000℃煅烧菱镁矿制备出轻烧MgO膨胀剂，研究了轻烧MgO掺量、养护温度、养护方式对水泥浆体变形行为的影响，并分析了粉煤灰的掺入对含MgO水泥浆变形的影响规律。结果表明，所制备的轻烧MgO膨胀剂具有持续稳定的膨胀性能，掺入后浆体的膨胀变形随温度的升高而加大。40℃养护条件下，掺6%MgO的水泥浆体可表现出自膨胀性。粉煤灰的掺入对MgO的膨胀性能有明显的抑制作用。 Abstract: A MgO-based expansive agent has been prepared by calcined magnesite under 1000℃ in the laboratory. The influences of MgO dosage, curring temperature and curring methods on the deformation behavior of cement pastes with this expansive agent were systematically studied. Meanwhile the effect of fly ash on the expansion ability of MgO was discussed. The results showed that the expansion produced by MgO in cement pastes is stable through the whole course of hydration, and with increasing the curring temperature, the expansion is enlarged. The cement paste containing 6% MgO exhibits autogenous expansion at 40℃ and tends to be stable after 90d. And the expansion performance of MgO was restrained by the addition of fly ash obviously.

英文名 : Influences of MgO-based Expansive Agent on the Deformation Behavior of Cement Pastes

刊期 : ２００9年第6期

关键词 : MgO膨胀剂；膨胀；自收缩；养护制度

Key words : MgO-based expansive agent; Expansion； Autogenous shrinkage； Curing regime

刊期 : ２００9年第6期

DOI :

文章编号 : 1000-4637（2009）06-05-04

基金项目 :

作者 : 李文伟1,2，唐明述1，张守治3

单位 : 1.南京工业大学，210008；2.中国长江三峡工程开发总公司，宜昌 433133； 3.江苏省建筑科学研究院，南京 210008

李文伟1,2，唐明述1，张守治3

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摘要

参数

结论

参考文献

引用本文

Abstract: A MgO-based expansive agent has been prepared by calcined magnesite under 1000℃ in the laboratory. The influences of MgO dosage, curring temperature and curring methods on the deformation behavior of cement pastes with this expansive agent were systematically studied. Meanwhile the effect of fly ash on the expansion ability of MgO was discussed. The results showed that the expansion produced by MgO in cement pastes is stable through the whole course of hydration, and with increasing the curring temperature, the expansion is enlarged. The cement paste containing 6% MgO exhibits autogenous expansion at 40℃ and tends to be stable after 90d. And the expansion performance of MgO was restrained by the addition of fly ash obviously.

关键词:

MgO膨胀剂；膨胀；自收缩；养护制度

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轻烧MgO膨胀剂对水泥浆体变形行为的影响

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