Assessment of pozzolanic reactivity is commonly based on a direct and indirect method which mostly used the electrical conductivity method. However,these methodsare limited by long-duration requirements or need to be done in laboratory. By modifying sandbox test measure resistivity Rice Husk Ash (RHA) as pozzolan, this investigation tries offer simpler that can situ. The RHA was heated oven wit...

The main aim of this paper is to review recent studies over the past 10 years investigating influencing factors for improving mechanical properties concrete. This focuses on concrete comprising pozzolanic materials, partially or entirely replacing ordinary Portland cement, in mixture. Firstly, effectiveness such as temperature, water solid (W/S) ratio, and alkaline solution ratio was briefly di...

Concrete is one of the most widely used construction materials in the world. However, the production of portland cement, an essential constituent of concrete, leads to the release of significant amount of CO2, a greenhouse gas; one ton of portland cement clinker production is said to creates approximately one ton of CO2 and other greenhouse gases (GHGs). Environmental issues are playing an impo...

Abstract The building materials branch of the construction industry is continuously developing due to occurrence new products which seek improve “green” character buildings by using different types wastes. Prefabricated sizes such as blocks, panels, beams and other spatial elements can now be obtained with eco-materials. Concrete most used material in thus it necessary diminish its environmenta...

This paper investigates the composition, properties and reactivity of a red mud waste generated in Saudi Arabia with view to find alternative materials replace construction binders high environmental impact. The phase transformation triggered by sintering RM up 1000°C is determined thermal X-Ray Diffraction analyses. Reactivity investigated chemical physical methods including Chapelle test, set...

Use of lime as construction material is limited mainly by low initial strength. These properties can be improved adding pozzolanic materials, but the evolution reaction usually needs older ages than 7 days. Alkali-activated or geopolymers, are good-performance materials that produced with residual waste. The combination traditional and new lead to uses mortars. This paper studies a lime/pozzola...