天然风积沙基本特性及火山灰活性研究

硅酸盐通报 ›› 2021, Vol. 40 ›› Issue (1): 163-171.

所属专题：资源综合利用

天然风积沙基本特性及火山灰活性研究

郑木莲, 荆海洋, 陈旺, 朱琳琳, 张姝, 高源

长安大学,特殊地区公路工程教育部重点实验室,西安 710064

收稿日期:2020-06-26 修回日期:2020-09-15 出版日期:2021-01-15 发布日期:2021-02-07
作者简介:郑木莲(1977—),女,教授。主要从事道路工程结构与材料方面的研究。E-mail:zhengmulian@163.com
基金资助:
国家自然科学基金(52078051)

Experimental Study on Basic Characteristics and PozzolanicActivity of Natural Aeolian Sand

ZHENG Mulian, JING Haiyang, CHEN Wang, ZHU Linlin, ZHANG Shu, GAO Yuan

Key Laboratory for Special Area Highway Engineering of Ministry of Education,Chang’an University,Xi’an 710064,China

Received:2020-06-26 Revised:2020-09-15 Online:2021-01-15 Published:2021-02-07

摘要/Abstract

摘要： 我国西北地区风积沙资源丰富,如果可以就地取材,将风积沙应用到实际工程中,将会产生巨大的经济和社会效益。目前国内外虽然已有不少关于风积沙工程应用的研究,但关于天然风积沙的理化特性以及火山灰活性还缺乏系统地研究和分析,大多都局限于某一特定的工程应用。本文对塔克拉玛干、古尔班通古特和腾格里三个沙漠地区地风积沙进行取样,通过对天然风积沙的颗粒组成、表观密度、堆积密度、空隙率、含泥量、含水率、吸水率、微观形貌等物理特性以及酸碱度、化学成分、矿物组成以及碱活性等化学特性的测试分析,发现三个地区的风积沙在物理和化学特性方面有一定的相似性。除此之外,采用活性指数法对天然风积沙的火山灰活性进行了评价,并使用6种化学激发剂对其活性进行激发,研究表明,天然风积沙的火山灰活性较低,Na₂SO₄和Ca(OH)₂可以激发天然风积沙的火山灰活性。

关键词: 风积沙, 理化特性, 火山灰活性, 激发剂, 西北地区

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

中图分类号:

TU521.1

郑木莲, 荆海洋, 陈旺, 朱琳琳, 张姝, 高源. 天然风积沙基本特性及火山灰活性研究[J]. 硅酸盐通报, 2021, 40(1): 163-171.

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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天然风积沙基本特性及火山灰活性研究

Experimental Study on Basic Characteristics and PozzolanicActivity of Natural Aeolian Sand

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