复合早强剂对掺石灰石粉砂浆强度和水化作用的影响

doi:10.11896/cldb.24010244

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Abstract As a by-product of industrial production, the annual production of stone powder is much greater than the consumption, and too much stone powder can cause serious environmental problems. The mortar with a large amount of stone powder can improve the utilization rate of stone powder, but the corresponding strength decreases. The addition of single early strength agent in mortar has a limited increase in early strength. In this work, the effects of three kinds of composite early strength agents DEIPA-Na₂SO₄, DEIPA-Al₂(SO₄)₃, DEIPA-Al₂(SO₄)₃)-Na₂SO₄ on strength and hydration of mortar with limestone powder were studied. The results by hydration heat, X-ray diffraction, differential thermogravimetric analysis, mercury intrusion porosimetry and scanning electron show that these three composite early strength agents can increase the hydration temperature, promote the formation of early hydration products, reduce porosity, and greatly improve the early compressive strength of mortar with limestone powder, but DEIPA-Na₂SO₄ and DEIPA-Al₂(SO₄)₃-Na₂SO₄ have a negative impact on the long time strength, while DEIPA-Al₂(SO₄)₃ still has a promoting effect.

Key words： composite early strength agent limestone powder mortar hydration compressive strength

Published: 10 March 2025 Online: 2025-03-18

CLC number:

TU528

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	Articles by authors
	ZHONG Xinyu
	LAI Junying
	RUAN Shaoqin
	QIAN Xiaoqian
	QIAN Kuangliang

Cite this article:

ZHONG Xinyu,LAI Junying,RUAN Shaoqin, et al. Effect of Composite Early Strength Agent on Strength and Hydration of Mortar with Limestone Powder[J]. Materials Reports, 2025, 39(5): 24010244-8.

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https://www.mater-rep.com/EN/10.11896/cldb.24010244 OR https://www.mater-rep.com/EN/Y2025/V39/I5/24010244

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