钙镁复合型多源体系膨胀剂的制备及其在混凝土中的应用

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发布时间：2020-01-06 00:00:00

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钙镁复合型多源体系膨胀剂的制备及其在混凝土中的应用

Preparation of Calcium-magnesium Composite Multi-source System Expansion Agent and Its Application in Concrete

2022年第9期

白云石；多源体系膨胀剂；煅烧温度；水化放热特性；膨胀率

Dolomite; Multi-source system expansion agent; Calcination temperature; Hydration exothermic; Expansion rate

2022年第9期

10.19761/j.1000-4637.2022.09.029.05

湖北省知识产权局2018年度高价值专利培育、转化和产业化项目。

王海龙1，贺念1，程福星2，邓小旭2，纪宪坤1

1.武汉三源特种建材有限责任公司，湖北武汉 430083；2.武汉源锦建材科技有限公司，湖北武汉 430083

王海龙1，贺念1，程福星2，邓小旭2，纪宪坤1

王海龙,贺念,程福星,等.钙镁复合型多源体系膨胀剂的制备及其在混凝土中的应用[J].混凝土与水泥制品,2022(9):29-32,37.

WANG H L,HE N,CHENG F X,et al.Preparation of Calcium-magnesium Composite Multi-source System Expansion Agent and Its Application in Concrete[J].China Concrete and Cement Products,2022(9):29-32,37.

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1000

摘要：利用白云石为主要矿源采用不同的煅烧制度和配合比制备了双膨胀源和三膨胀源膨胀剂，并研究了其水化放热速率和限制膨胀率，探讨了该钙镁复合型多源体系膨胀剂对混凝土力学性能的影响。结果表明：随着煅烧温度的升高，双膨胀源膨胀剂的水化放热速率和温峰先升高后降低，温峰值分别为80.5、82.2、61.8、31.6 ℃，且到达温峰的时间也随之变化；相同膨胀剂掺量下，双膨胀源膨胀剂的膨胀率随着煅烧温度的升高而降低，950 ℃时膨胀率最优；养护温度越高，膨胀反应速率越快，膨胀性能发挥越充分，60 ℃养护时，膨胀主要发生在混凝土前14 d，后期变化不大；三膨胀源膨胀剂对混凝土前28 d的抗压强度有一定贡献，但60 d时较对照组有一定降低。 Abstract: The dual-expansion source and triple expansion source expansion agents by Using dolomite as the main mineral source at the different calcination systems and material ratios were prepared. Based on the analysis of its mineral composition, the hydration heat release rate and the limiting expansion rate of the expansion agent were determined. The influence of the calcium-magnesium composite multi-source system expansion agent on the mechanical properties of concrete was also discussed. The results show that with the increase of the calcination temperature, the hydration heat release rate and the temperature peak of the dual-expansion source expansion agent increase and then decrease. The temperature peaks are 80.5 ℃, 82.2 ℃, 61.8 ℃ and 31.6 ℃ respectively, and the time to reach the temperature peak also changes accordingly. At the same content, the expansion rate of dual-expansion source expansion agent gradually decreases with the increase of the calcination temperature, and the calcination temperature at 950 ℃ is the best. The higher curing temperature, the faster expansion reaction rate. When the curing temperature is 60 ℃, the expansion of concrete mainly occurs before the 14 d age, and there is little change at late age. The triple-expansion source expansion agent has has a certain contribution to the compressive strength of concrete before 28 d, but at 60 d, it is lower than that of control group.

英文名 : Preparation of Calcium-magnesium Composite Multi-source System Expansion Agent and Its Application in Concrete

刊期 : 2022年第9期

关键词 : 白云石；多源体系膨胀剂；煅烧温度；水化放热特性；膨胀率

Key words : Dolomite; Multi-source system expansion agent; Calcination temperature; Hydration exothermic; Expansion rate

刊期 : 2022年第9期

DOI : 10.19761/j.1000-4637.2022.09.029.05

文章编号 :

基金项目 : 湖北省知识产权局2018年度高价值专利培育、转化和产业化项目。

作者 : 王海龙1，贺念1，程福星2，邓小旭2，纪宪坤1

单位 : 1.武汉三源特种建材有限责任公司，湖北武汉 430083；2.武汉源锦建材科技有限公司，湖北武汉 430083

王海龙1，贺念1，程福星2，邓小旭2，纪宪坤1

王海龙,贺念,程福星,等.钙镁复合型多源体系膨胀剂的制备及其在混凝土中的应用[J].混凝土与水泥制品,2022(9):29-32,37.

WANG H L,HE N,CHENG F X,et al.Preparation of Calcium-magnesium Composite Multi-source System Expansion Agent and Its Application in Concrete[J].China Concrete and Cement Products,2022(9):29-32,37.

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摘要

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参考文献

引用本文

Abstract: The dual-expansion source and triple expansion source expansion agents by Using dolomite as the main mineral source at the different calcination systems and material ratios were prepared. Based on the analysis of its mineral composition, the hydration heat release rate and the limiting expansion rate of the expansion agent were determined. The influence of the calcium-magnesium composite multi-source system expansion agent on the mechanical properties of concrete was also discussed. The results show that with the increase of the calcination temperature, the hydration heat release rate and the temperature peak of the dual-expansion source expansion agent increase and then decrease. The temperature peaks are 80.5 ℃, 82.2 ℃, 61.8 ℃ and 31.6 ℃ respectively, and the time to reach the temperature peak also changes accordingly. At the same content, the expansion rate of dual-expansion source expansion agent gradually decreases with the increase of the calcination temperature, and the calcination temperature at 950 ℃ is the best. The higher curing temperature, the faster expansion reaction rate. When the curing temperature is 60 ℃, the expansion of concrete mainly occurs before the 14 d age, and there is little change at late age. The triple-expansion source expansion agent has has a certain contribution to the compressive strength of concrete before 28 d, but at 60 d, it is lower than that of control group.

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钙镁复合型多源体系膨胀剂的制备及其在混凝土中的应用

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