石膏基地面轻质保温层材料的制备及性能研究

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Abstract With the α-hemihydrate as the main cementifying material, mixed expanded polystyrene (EPS) and vitrified microsphere (VM) as light aggregate, and the mixture ratio of gypsum, cement and fly ash was used to establish the regression equation and conduct multi-objective optimization analysis. The experimental research on gypsum based thermal insulation mortar was conducted from the macro-performance, pore structure and micro-analysis respectively. Experimental results showed that through the analysis of macro performance and pore size structure, the V_VM∶V_EPSof light aggregate is 3∶7, and the optimal ratio is 82.6% of gypsum, 12% of cement and 5.4% of fly ash. The good particle grading of EPS and VM reduces the porosity of mortar. Cement and fly ash mutually promote the generation of hydration products in gypsum environment. The cementitious C-S-H, needle-like AFt and unhydrated SiO₂ particles together fill the pores of gypsum crystal, making the internal matrix of products more compact. It provides good mechanical properties and thermal conductivity, and meets the requirements of composite plate insulation material for ground.

Key words： gypsum insulation material light aggregate mixture optimization

Published: 09 December 2021

CLC number:

TU55

Fund:The work was funded by the National Key Research and Development Program of China (2018YFD1101000).

About author:: Cheng He, a master of Nanjing Tech University,focusing on the research of lightweight insulation materials for ground.
Dongxu Li, a doctoral supervisor of Nanjing Tech University, focusing on the research of alkali activated cementitious material and cement-based composites.

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	HE Cheng
	LI Qingchao
	ZHOU Han
	LI Dongxu

Cite this article:

HE Cheng,LI Qingchao,ZHOU Han, et al. Study on Preparation and Properties of Light Insulation Material for Gypsum Base Surface[J]. Materials Reports, 2021, 35(z2): 236-240.

URL:

http://www.mater-rep.com/EN/ OR http://www.mater-rep.com/EN/Y2021/V35/Iz2/236

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