Experimental Study on Basic Characteristics and PozzolanicActivity of Natural Aeolian Sand

Abstract

Abstract: Northwest China is rich in aeolian sand resources.If aeolian sand can be used actual projects locally,huge economic and social benefits will be produced.Although there have been many researches on the application of aeolian sand engineering at home and abroad,there is still a lack of systematic research and analysis on the basic physicochemical properties and pozzolanic activity of natural aeolian sand,most of which are confined to a specific engineering application.In this paper,the aeolian sands in the three desert regions of Taklamakan,Gurbantunggut and Tengger were sampled.The physical characteristics of natural aeolian sand,such as particle composition,apparent density,bulk density,porosity,mud content,moisture content,water absorption,micro-morphology,and chemical characteristics such as pH,chemical composition,mineral composition and alkali activity were tested and analyzed.The results show that there are some similarities in physical and chemical characteristics of aeolian sand in the three regions.In addition,the pozzolanic activity of natural aeolian sand was evaluated by activity index method,and six chemical activators were used to improve its activity.The study proves that the pozzolanic activity of natural aeolian sand is low,and the addition of Na₂SO₄ and Ca(OH)₂ improves the pozzolanic activity of natural aeolian sand.

Key words: aeolian sand, physicochemical property, pozzolanic activity, activator, northwest district

CLC Number:

TU521.1

ZHENG Mulian, JING Haiyang, CHEN Wang, ZHU Linlin, ZHANG Shu, GAO Yuan. Experimental Study on Basic Characteristics and PozzolanicActivity of Natural Aeolian Sand[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2021, 40(1): 163-171.

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