Print ISSN: 1681-6900

Online ISSN: 2412-0758

Keywords : cement mortar

Incorporation of Iraqi Rocks in the Production of Eco-Friendly Cement Mortar

Rawnaq S. Mahdi; Aseel B. Al-Zubaidi; Hassan N. Hashim

Engineering and Technology Journal, 2020, Volume 38, Issue 10A, Pages 1522-1530
DOI: 10.30684/etj.v38i10A.1479

This work reports on the incorporation of Flint and Kaolin rocks powders in the cement mortar in an attempt to improve its mechanical properties and produce an eco-friendly mortar. Flint and Kaolin powders are prepared by dry mechanical milling. The two powders are added separately to the mortars substituting cement partially. The two powders are found to improve the mechanical properties of the mortars. Hardness and compressive strength are found to increase with the increase of powders constituents in the cement mortars. In addition, the two powders affect water absorption and thermal conductivity of the mortar specimens which are desirable for construction applications. Kaolin is found to have a greater effect on the mechanical properties, water absorption, and thermal conductivity of the mortars than Flint. This behavior is discussed and analyzed based on the compositional and structural properties of the rocks powders.

Production of Self-Cleaning SiO2/CNT Nanoparticles Substituted Cement Mortar

Layth Al-Gebory; Aseel B. Al‐Zubaidi; Ahmed A. Al‐Tabbakh

Engineering and Technology Journal, 2020, Volume 38, Issue 3A, Pages 335-342
DOI: 10.30684/etj.v38i3A.349

Manufacturing of building materials with unique properties is one of the most important key-parameters in the development of construction engineering and building materials. The development in the nanomaterials and nanotechnology can be utilized in this field. In this paper, production of eco-friendly, low water absorption and self-cleaning cement mortar reinforced with carbon nanotubes and nano-silica with different weight percentages (0.5%, 1.5%, and 2%) is performed. Results showed prominent improvement of hardness, compression strength and a decrease of water absorption and bending resistance in the reinforced cement mortars. The results show the possibility to control the mechanical properties of the cement mortars with minimal reinforcing agents provides the possibility to design these building materials for versatile applications