Pozzolans have been used to improve the some properties of concrete and also to reduce the cost of producing cement. Many researchers investigated pozzolanic cements, which were mostly made with kind of artificial or natural pozzolans. While the most recent investigations on pozzolan containing cements study the effect of pozzolan type, replacement amount and fineness, this study was investigat...

Pozzolans are used as additives in stabilizing clayey soils and trass cement production. Natural unnatural pozzolans added to the ground stabilization process increase bearing strength of soil, reduce deformations that will occur a result stresses, settlements, swelling potential, liquefaction potential permeability. It Pozzolans, which called trass, heat hydration, resistance concrete against ...

  Abstract: In recent years, many research works have been done to investigate the possibility of utilizing a broad range of materials as raw materials in the production of geopolymer cements. The use of artificial pozzolans or aluminosilicate-type industrial waste materials such as granulated blast-furnace slag and fly ash has been reported in many research works. Natural pozzolans are also al...

The pozzolans of the Moroccan Middle Atlas are derived from a low explosive volcanism, mostly strombolian. They mainly composed olivine and pyroxene, presenting less homogeneous structure (irregular vesicles). main target this project is to study use natural (NP) metakaolin as precursors for production geopolymeric binders. characterization raw materials elaborated geopolymers was carried out t...

Concrete is one of the most widely used construction materials all around globe. Associated with urban expansion, concrete pavements increase impermeable surfaces that affect hydrological cycle and generate heat islands. Cement main components concrete, its production sources worldwide CO2 emissions. Pervious partial cement replacement represents a more sustainable alternative. In this paper, u...

The use of methods based on measuring electrical conductivity to assess pozzolanic activity has recently been used primarily in aqueous suspensions of pozzolan: calcium hydroxide. However, the use of similar methods in suspensions of cement with pozzolans has not been widely studied. This paper proposes a new method for rapid assessment of the pozzolanic activity of mineral admixtures in aqueou...

This study aims to assess the effect of sodium chloride attack on mechanical and durability properties high-performance concrete (HPC) based fibers natural pozzolans. The resistance specimens against chemical is determined by unit weight, compressive strength, splitting-tensile ion permeability, apparent gas visual inspection after 28, 90, 180, 365 days testing. A total three types are assessed...