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首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >Effect of water on the thermal properties of argillite - based geopolymers.
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Effect of water on the thermal properties of argillite - based geopolymers.

机译：水对基于石毛石的地质聚合物热性能的影响。

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摘要

This study focuses on the effect of consolidation time and water immersion on the thermal behavior of geopolymers based on mixture of kaolin and argillite calcined at 750 degrees C. In order to assess the fire resistance water and thermal treatment at 1000 degrees C were performed. Compressive strength and structural changes of the samples before and after treatment were investigated. It was demonstrated that the age of geopolymer (7, 14 and 28 days of consolidation) does not have a significant effect on strength neither before (22 MPa) nor after (30 MPa) thermal treatment. The results also show that all samples present higher compressive strength ratio (sigma(after)/sigma(before) similar to 1.4). The geopolymer samples do not exhibit structural variation over the time in agreement with the compressive strength values. The good performance of compressive strength after 1000 degrees C was due to the formation of the same crystalline phases after heat treatment such as zeolite (4%) and leucite type phases (62%) and wollastonite (18%) which were also evidenced by SEM observations. The decrease of compressive strength after water immersion (16 MPa) and after thermal treatment (19 MPa) was explained by the decrease of arcanite by 70% as well as the amorphous phase content. Nevertheless, leucite (46%) and wollastonite (24%) were formed. In conclusion, the use of mixture of kaolin and argillite calcined at 750 degrees C leads to water and thermal resistant geopolymers.
机译：该研究侧重于基于750℃煅烧的高岭土和晶体煅烧的岩土聚合物热行为的效果。为了评估耐火水和1000℃的热处理。研究了治疗前后样品的抗压强度和结构变化。据证明，岩土聚合物（7,14和28天的固结）的年龄对（22MPa）和（30MPa）热处理之前没有产生显着影响。结果还表明，所有样品均具有较高的抗压强度比（类似于1.4的σ/σ（之前））。与压缩强度值同意，地质聚合物样品在随时没有表现出结构性变化。 1000摄氏度后的抗压强度的良好性能是由于在热处理之后形成了相同的结晶相，例如沸石（4％）和硅藻酸型相（62％）和硅灰石（18％），这也通过SEM证明观察。水浸后的抗压强度（16MPa）和热处理后（19MPa）的降低减少，通过降低70％以及非晶相含量来解释。然而，形成了益酸盐（46％）和硅灰石（24％）。总之，在750℃下煅烧高岭土和颗粒状物的混合物导致水和热阻地质聚合物。

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