High strength green concrete by using biomass aggregate

• Main Author: Tang, Hing Kwong (Author)
• Format: Thesis
• Published: 2015-01.
• Subjects: TA Engineering (General). Civil engineering (General); Thesis
• Online Access: Get fulltext

 The use of High Strength Concrete (HSC) for construction, especially for multi-story buildings, has become very common in industrialized and developing countries. But for a variety of reasons, the HSC construction industry is not sustainable because of it consumes huge quantities of natural materials and production of the portland cement, which is a major contributor to greenhouse gas emissions, global warming and climate change. The aim of this research is to identify the performance of HSGC with ingredients of biomass aggregate; fly ash and Supracoat SP800 which are mostly industrial byproducts make the product environmentally friendly. The study was carried out to identify the chemical properties of biomass aggregate, and to determine the engineering properties and optimum mix design of the High Strength Green Concrete (HSGC). A total of 90 cube samples with replacement biomass aggregate (15% & 30%) and fly ash (4%, 6% & 8%) were casted and compressive strength tested at the age of 7, 14 and 28 days after curing in water. The overall results shown that the workability and compressive strength will decrease with the increased of the replacement granite with biomass aggregate. But the workability and compressive strength will increase with the incorporation with the replacement cement by fly ash. The HSGC gained highest compressive strength for the concrete mixes is Series C2 which was 39.3N/mm2. The optimum percentage used of HSGC in producing concrete was not exceed with 30% biomass aggregate and 6% fly ash as a partial replacement with granite and cement respectively. The results obtained and observation made in this study suggest that biomass aggregate and fly ash are successfully used as partial replacement in producing for normal strength concrete but not for high strength concrete because their strength concrete don't achieve 40N/mm2 based on British Standard.