Chao-qiang Wang, Lin Yu, Hao-ran Wang, Sheng-hui Gao, Jian-Shan Huang, Xi Chen, Meng-sheng Shao
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引用次数: 0
Abstract
This study compared and evaluated the working performance and mechanical properties of LC50 fly ash microbead lightweight high-strength concrete (FLHSC) using fly ash microbeads, cement, water-reducing agent dosage, water–cement ratio, and types of additives as variables. Through reasonable design of expansion tests, bulk density tests, and mechanical strength tests, the basic optimal combination was obtained. The research results indicate that the optimal mix ratio of FLHSC is: fly ash floating beads 230 kg/m3, ceramsite 200 kg/m3, cement 1200 kg/m3, water 360 kg/m3, water-reducing agent 20.4 kg/m3. The water–binder ratio is selected as 0.3, type II water-reducing agent is selected, and the dosage is 1.7% of the cementitious material. Its slumps is 680 mm, and its dry bulk density is 1562.0 kg/m3, the 28-day strength is 52.4 MPa. On this basis, the microstructure and hydration products of FLHSC under different conditions were analyzed in depth using scanning electron microscopy and infrared spectroscopy, and the interface enhancement mechanism and failure mode were studied in depth. It is found that the failure of FLHSC is close to the vertical failure mode, and the crack always passes through the lightweight aggregate. In addition, a life cycle assessment and CO2 emission calculation from production to application were conducted on FLHSC. In addition, a life cycle assessment and CO2 emission calculation were conducted on FLHSC from production to application, and the results showed that FLHSC has better environmental benefits than ordinary C50 concrete, with a CO2 emission of 632.443 (kgCO2/t). Finally, the application of LWHSC was analyzed.
期刊介绍：
Archives of Civil and Mechanical Engineering (ACME) publishes both theoretical and experimental original research articles which explore or exploit new ideas and techniques in three main areas: structural engineering, mechanics of materials and materials science.
The aim of the journal is to advance science related to structural engineering focusing on structures, machines and mechanical systems. The journal also promotes advancement in the area of mechanics of materials, by publishing most recent findings in elasticity, plasticity, rheology, fatigue and fracture mechanics.
The third area the journal is concentrating on is materials science, with emphasis on metals, composites, etc., their structures and properties as well as methods of evaluation.
In addition to research papers, the Editorial Board welcomes state-of-the-art reviews on specialized topics. All such articles have to be sent to the Editor-in-Chief before submission for pre-submission review process. Only articles approved by the Editor-in-Chief in pre-submission process can be submitted to the journal for further processing. Approval in pre-submission stage doesn''t guarantee acceptance for publication as all papers are subject to a regular referee procedure.
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