Engineering and Technology Journal

Author = Qais J. Frayyeh

Number of Articles: 2
Effect of Ordinary Portland Cement on Some Properties of Pervious Geopolymer Concrete
Effect of Ordinary Portland Cement on Some Properties of Pervious Geopolymer Concrete

Wasan I. Khalil; Qais J. Frayyeh; Haider T. Abed

Volume 39, 4A , April 2021, , Page 668-674

https://doi.org/10.30684/etj.v39i4A.1793

Abstract
  In this research, a study is made on the Pervious Geopolymer Concrete (PGC), which is based on local material (Metakaolin). The inclusion of Ordinary Portland Cement (OPC) as a partial ...  Read More ...
Thermally Activated Bentonite As a Supplementary Cementitious Material – A Review
Thermally Activated Bentonite As a Supplementary Cementitious Material – A Review

Amer A. Al-Hammood; Qais J. Frayyeh; Waleed A. Abbas

Volume 39, 2A , February 2021, , Page 206-213

https://doi.org/10.30684/etj.v39i2A.1733

Abstract
  Bentonite is a mixture of clay and non-clay minerals. Montmorillonite clay mineral is a dominant mineral in bentonite. Silica and alumina bond in the crystal structure of montmorillonite. ...  Read More ...