This paper addresses the property requirements of repair materials for high durability performance for concrete structure repair. It is proposed that the high tensile strain capacity of High Performance Fiber Reinforced Cementitious Composites (HPFRCC) makes such materials particularly suitable for repair applications, provided that the fresh properties are also adaptable to those required in p...

Wisconsin Department of Transport (WisDOT) permits use of Grade A-FA (70% cement plus 30% Class C fly ash) concrete mixtures for pavement construction. This paper discusses a laboratory investigation performed to study the effects of the cementitious materials such as portland cement, ASTM Class C fly ash, ground granulated blast furnace slag (GGBFS), blends of cement and fly ash, and cement pl...

Clay is a naturally occurring material that can be converted to different clay minerals through thermal treatments, and used for the development of products. Clays have been applications in sectors. Detailed information regarding these materials construction industry are described. has as supplementary cementitious Portland cement (OPC) mortars concretes. These decrease raw CO2 emissions during...

This investigation was performed to establish the effects of the source and amount of fly ash on abrasion resistance of concrete. A reference concrete was proportioned to have a 28day age strength of 41 MPa. Three sources of Class C fly ash were used in this research. From each source, three levels of fly ash to total cementitious materials content (40, 50, and 60%) were used in producing the c...

one of the main concerns of teachers in modern learner-centered approaches is whether published teaching materials can meet the needs of students at a particular leaning situation or the teachers ought to prepare their own materials. this dilemma gets worse when the teaching situation includes a textbook prescribed by an authority such as the ministry of education. in such cases, the teacher ha...

Coal-fuel power plants with semi-dry or dry flue gas desulfurization (FGD) systems produce high sulfur and/or alkali fly ashes due to comingling of ash FGD products. Such do not meet the SO3 content limit (5.0% max.) ASTM C618 are unable mitigate alkali-silica reaction. The mineralogy present in these can vary significantly (e.g., CaSO4, CaSO3, Na2SO4) based on technology used and this affects ...