TY - JOUR ID - 114680 TI - Impact of Replacing Kaolinite with Slag, Fly Ash and Zeolite on the Mechanical Strengths of Geopolymer Concrete Based on Kaolinite JO - Building Engineering & Housing Science JA - BEHS LA - en SN - 1735-8736 AU - Esparham, Alireza AU - Hosseni, Mir Hamid AU - Mousavi Kashi, Azam AU - Emami, Fereshteh AU - Moradikhou, Amir bahador AD - structural, and geotechnics engineering department, Islamic Azad University, Science and Research branch, Tehran, Iran AD - . Assistant professor of civil, structural, and geotechnics engineering department, Islamic Azad University, Science and Research branch, Tehran, Iran AD - Assistant professor of materials engineering department, Islamic Azad University, Science and Research branch, Tehran, Iran AD - Assistant professor of civil, structural, and geotechnics engineering department, Islamic Azad University, Science and Research branch, Tehran, Iran Y1 - 2020 PY - 2020 VL - 13 IS - 3 SP - 9 EP - 15 KW - Geopolymer concrete KW - Kaolinite KW - Slag KW - Fly ash KW - Zeolite DO - N2 - In recent years, geopolymer concrete has been introduced as a green alternative to Portland cement concrete which can potentially reduce negative environmental impacts of Portland cement. Geopolymers are manufactured from 2 main parts: Alominosilicate source and alkaline activator solution. The most common Alominosilicate sources used in geopolymers are as follows: fly ash, blast furnace slag, metakaolin and zeolite. Geopolymer concrete can also be manufactured by using a combination of these sources. But, on the other hand, it is necessary to study the impact of using these sources on different characteristics of geopolymer concrete such as mechanical properties and so on. In this experimental study, the effect of replacing kaolinite with fly ash (Class F), slag and zeolite on the compressive, tensile and flexural strengths of geopolymer concrete based on kaolinite, was investigated. In this regard, kaolinite was replaced by these sources in the ratio of 10, 20 and 30%. Subsequently, geopolymer concrete specimens were manufactured and cured at 80°C. Thereafter, they were subjected to 7-days and 28-days compressive, tensile and flexural strength tests. The obtained results indicated that replacing kaolinite with slag and fly ash (Class F) results in increasing compressive, tensile and flexural strengths of geopolymer concrete specimens. Also, replacement of kaolinite with Zeolite reduces the mechanical strengths of geopolymer concrete specimens. UR - https://behs.bhrc.ac.ir/article_114680.html L1 - https://behs.bhrc.ac.ir/article_114680_02a9bc9f582e8021f6585890ae573cb5.pdf ER -