Concrete is a construction material made from mixture of Portland cement, air, coarse aggregate, fine and sometimes also uses admixture materials with certain ratio. Cement, which the binding agent in concrete mixture, contributes to 8% world's carbon dioxide (CO2) emissions. Fly ash steel slag are one wastes that currently being researched developed as cement ingredients mixtures. This because...

Sufficient deformability can be achieved in concrete while maintaining segregation resistance either by using a chemical viscosity-modifying admixture (VMA) or increasing the fine content concrete. Using VMA, initial cost of self-compacting (SCC) increases, making it unsuitable for general construction. As result, alternative methods lowering SCC must investigated. In this study, we assess effe...

Deterioration of concrete, which is mainly due to ignorance of environmental and service conditions, causes considerable costs for the construction industry. With this in mind, in this paper, results of investigation into the major causes of concrete deterioration in the Urumie Lake are presented. For the purposes of this investigation, samples were obtained by mixing two types of cement (OPC t...

With the retirement of coal-fired power stations, wet-stored stockpile fly ash is increasingly receiving attention for use in concrete. An important consideration dry this application its impact on air entrainment, which can be affected by unburnt carbon present, influencing bubble stability and air-entraining admixture (AEA) dose requirements. Preliminary tests suggest wet storage influence pr...

In the precast building structure, joint is key part that affects mechanical performance of assembly structure. By selecting coarse and fine fraction aggregate; adding high quality mineral admixture, expansive agent, water-reducing agent; optimizing mixture ratio design, members concrete (PMJC) with self-compacting performance, micro-shrinkage, good volume stability, strength matching developed...

Concrete a composite material made from cement, water, fine aggregate and coarse aggregate. But present researchers are in interest of finding new cement materials by waste materials or waste products produced from industries which are harmful to environment. The present paper deals with partial replacement of cement with quarry dust and metakaolin which are having silica used as admixture for ...

Deterioration of concrete, which is mainly due to ignorance of environmental and service conditions, causes considerable costs for the construction industry. With this in mind, in this paper, results of investigation into the major causes of concrete deterioration in the Urumie Lake are presented. For the purposes of this investigation, samples were obtained by mixing two types of cement (OPC t...