Utilization of Cement Kiln Dust (CKD) with Silica Fume (SF) as a Partial Replacement of Cement in Concrete Production

• 作者: Ahmed Islam Abdullah Arafa Elsayed Elhelloty Mohammed Taha Nooman Rafik Khairy Abdelwahab
• 来源期刊: 矿物质和材料特性和工程(英文)
• 学科: 医学
• 关键词: PARTIAL REPLACEMENT of CEMENT CEMENT Kiln Dust (CKD) Silica Fume (SF) Properties of Fresh and Hardened Concrete MODULUS of ELASTICITY Bond Strength XRF
• 年，卷（期）: 2019,（4）
• 页码范围: 137-149
• 页数: 13页
• 分类号: R73

摘要

This research aimed to clarify the role of by-product materials, such as CKD with SF as partial replacement by weight of cement in concrete manufacturing and inclusion on different characteristics of concrete. Concrete test specimens were mixed with 0%, 5%, 10%, 15%, 20% and 25% (CKD) with 15% (SF) as partial replacement by weight of Cement (CEM I-52.5N). Fresh concrete properties have been evaluated by workability measurement slump test. While hardened concrete properties have been evaluated by compressive, split tensile and flexural strengths tests at ages 7, 28 and 56 days, but evaluated for bond strength, modulus of elasticity and chemical composition measurement with X-Ray Fluorescence at age of 28 days. The test results have revealed that the increase of CKD amount with fixed amount of SF in concrete mixtures as partial replacement by weight of cement leads to gradual decrease of fresh concrete workability. In concrete mixtures, 20% CKD in the presence of 15% SF as partial replacement by the weight of cement are the optimum ratios which can be used without any negative effect on mechanical properties compressive, indirect tensile, flexural and bond strength at all the ages of concrete. Also modulus of elasticity and bond strength increased by 8.81% and 0.69% respectively at the age 28 days compared with control mixture.