Center for By-Products Utilization DURABILITY OF FLY ASH CONCRETE SYSTEM INCORPORATING HIGH-CALCIUM FLY ASH - A REVIEW
نویسندگان
چکیده
This paper deals with the state-of-the-art information on high-calcium, ASTM Class C fly ash use in cement-based construction materials, such as high-performance concrete, ready-mixed concrete, etc. The major topics included are: properties of fly ash, effects of fly ash inclusion on fresh and hardened concrete, and future research needs. The fresh concrete properties include workability, water requirement, bleeding, segregation, air content, time of set, and temperature effect. The hardened concrete properties include primarily durability-related properties such as permeability, freezing and thawing resistance, abrasion resistance, salt scaling resistance, sulfate resistance, alkali-silica reaction, carbonation and corrosion of steel in concrete, and abrasion resistance. Previous investigations have substantiated that high-performance concrete (HPC) containing significant amounts (up to 40% cement replacement levels) of Class C fly ash can be manufactured for compressive strength exceeding 100 MPa. Future research efforts should be directed towards use of high-lime fly ash in blended cements with minimum (less than 20%) portland cement in the blend.
منابع مشابه
Durability Performance of Self Compacting Concrete Incorporating Alccofine and Fly Ash
The cost associated with the application of large volume of cement and synthetic admixtures was one of the major drawbacks of Self Compacting Concrete (SCC), which can be reduced by the use of supplementary cementitious materials (SCM). When the demand of cement reduces, the release of carbon dioxide (CO2) from cement industries will come down, which has a positive impact on global w...
متن کاملCenter for By-Products Utilization MECHANICAL PROPERTIES OF CONCRETE INCORPORATING HIGH-CALCIUM FLY ASH - A REVIEW
متن کامل
Combine Use of Fly Ash and Rice Husk Ash in Concrete to Improve its Properties (RESEARCH NOTE)
This research paper describes the study of combined effect of Fly Ash (FA) and Rice Husk Ash (RHA) on properties of concrete as partial replacement of Ordinary Portland Cement (OPC). These by-products are having high pozzolanic reactivity. In this research, the composition of mix was used with 10% RHA along with 10, 20 and 30% FA as partial replacement of cement. In this study, the compressive ...
متن کاملPREDICTION OF COMPRESSIVE STRENGTH AND DURABILITY OF HIGH PERFORMANCE CONCRETE BY ARTIFICIAL NEURAL NETWORKS
Neural networks have recently been widely used to model some of the human activities in many areas of civil engineering applications. In the present paper, artificial neural networks (ANN) for predicting compressive strength of cubes and durability of concrete containing metakaolin with fly ash and silica fume with fly ash are developed at the age of 3, 7, 28, 56 and 90 days. For building these...
متن کاملCenter for By-Products Utilization Performance Testing of Controlled Low Strength Materials and Concrete Using High-Carbon Fly Ash
This project consisted of performance testing and evaluation of concrete and Controlled LowStrength Materials (CLSM) containing high-carbon fly ash. One of the aims of this project was to determine the feasibility of incorporating carbon fibers into CLSM and concrete mixtures to lower electrical resistance of these two construction materials. This is continuing work performed by the UWM Center ...
متن کامل