Preparation and properties of geopolymer-lightweightaggregate refractory concrete

来源期刊：中南大学学报(英文版)2009年第6期

论文作者：胡曙光 吴静 杨文 何永佳 王发洲 丁庆军

文章页码：914 - 918

Key words：refractory concrete; geopolymer; lightweight aggregate; thermal property; equal thickness model

Abstract: Geopolymer-lightweight aggregate refractory concrete (GLARC) was prepared with geopolymer and lightweight aggregate. The mechanical property and heat-resistance (950 ℃) of GLARC were investigated. The effects of size of aggregate and mass ratio of geopolymer to aggregate on mechanical and thermal properties were also studied. The results show that the highest compressive strength of the heated refractory concrete is 43.3 MPa, and the strength loss is only 42%. The mechanical property and heat-resistance are influenced by the thickness of geopolymer covered with aggregate, which can be expressed as the quantity of geopolymer on per surface area of aggregate. In order to show the relationship between the thickness of geopolymer covered with aggregate and the thermal property of concrete, equal thickness model is presented, which provides a reference for the mix design of GLARC. For the haydite sand with size of 1.18-4.75 mm, the best amount of geopolymer per surface area of aggregate should be in the range of 0.300-0.500 mg/mm².

基金信息：the National Basic Research Program of China
the Key Laboratory for Refractories and High-temperature Ceramics of Hubei Province, China