Engineering and Technology Journal

Using Polyethylene Glycol to Produce Self Cured Cement Mortar

Rasha Rawdhan; Awham M. Hameed; Shakir A. Salih

Volume 36, 4A , April 2018, , Page 401-409

https://doi.org/10.30684/etj.36.4A.6

Abstract

The capacity of self-curing admixture is to reduce the evaporation of water from mortar, and subsequently they increase the ability of water retention from mortar contrasted with those ... Read More ...

Effect of Nano TiO2 Additives on Some Properties of Out Door Building Unites

Alaa A. Abdul-Hamead; Shatha R. Ahmed Izzat

Volume 34, 13A , December 2016, , Page 2398-2405

https://doi.org/10.30684/etj.34.13A.3

Abstract

In this paper a lower ratio of two powders; nano and micro titanium dioxide (TiO2) powder were used as additive in fabrication of mortar. Particle size of TiO2 powder were (80nm,1.6µm). ... Read More ...

Studying the Effect of Nano Additives and Coating on Some Properties of Cement Mortar Mixes

Farhad. M. Othman; Alaa.A.Abdul Hameed; Sarmad. I. Ibrahim

Volume 34, 3A , March 2016, , Page 553-566

https://doi.org/10.30684/etj.34.3A.10

Abstract

The experimental work is divided in two parts, in the first part was prepared the mortar samples and mixing proportions cementsand (1:3)they were mixing these samples with nano scale ... Read More ... The experimental work is divided in two parts, in the first part was prepared the mortar samples and mixing proportions cementsand (1:3)they were mixing these samples with nano scale ceramic powders (ZrO2 and TiO2) respectively the percentages by weight are taken from cement ratio (0.1, 1, 2.5, 5, and 10%) at particle size (50nm) and curing time (28day). The second part has included the preparation of mortar samples and then coated with a mixture of methanol alcohol, cement and ceramic nano-powders by cold spray technique by using compressed air at room temperature with pressure (8bar) and the spray distance (20Cm) and heating of the samples at (75C°), and then study mechanical thermal physical and structural properties for prepared samples. The results of mechanical and physical tests showed large and significant improvement for all mixed and coated samples with nanoparticles, and that the highest value of the mechanical and physical properties obtained from cement coated samples with (%5ZrO2), reaching the rate of increase in values of Vickers hardness by (%54), and wear resistance increased by (%66), while reaching the rate of decrease in values of total water absorption by (%79), The porosity has decreased at a rate of (%65), With regard to the dry density has increased at a rate of (%2.3). The higher values for the mixed samples reaching the rate of increase in values of Vickers hardness by (%38), and wear resistance increased by (%58), while reaching the rate of decrease in values of total water absorption by (%67), The porosity has decreased at a rate of (%51.68), With regard to the dry density has increased at a rate of (%1.9). The thermal conductivity test results have shown that there is a marked decrease in values conductivity for all mixed and coated samples with nanoparticles and that the minimum value of conductivity obtained from coated and mixed samples with (%5TiO2) as the value decreases conductivity for coated samples by (%64), while the lowest value for conductivity to the mixed samples by (%49). Results of Characterizations tests showed images of all of (SEM and AFM) Mortar reference sample that a high roughness as well as having to structure Ca(OH)2 a needle shaped structures with the presence of large pores, while after adding and coating by nanoparticles shows the disappearance of structures needle and produce a homogeneous structure of compounds (C-S-H) and the disappearance of the pores and gaps further decrease in surface roughness this explains the clear improvement in the properties.

Characterization of Nano Powder Incorporated for Building Applications

Alaa A. Abdul-Hamead; Farhad M. Othman; Mustafa M .Salih

Volume 33, 6B , July 2015, , Page 1027-1039

https://doi.org/10.30684/etj.2015.116257

Abstract

In this paper Nano powders were used a mono; copper oxide CuO and di metal oxides powder; titanium dioxide (TiO2) in fabrication of mortar. Powder particle size about (67.8 nm) for ... Read More ...

High Performance of Silica Fume Mortars for Ferrocement Applications

M. A. Mashrei; Gh. M. Kamil; H. M. Oleiwi

Volume 31, Issue 13 , August 2013, , Page 2477-2488

https://doi.org/10.30684/etj.31.13A.6

Abstract

The current study deals with obtaining the high performance mortars to use in the applications of ferrocement. The main problem that has greatly affected the performance of mortar is ... Read More ...

Thermal Analysis of High Performance Lightweight Concrete Sandwich Panels

Wasan I. Khalil; Zain A. Raouf; Husain M.Husain

Volume 28, Issue 21 , October 2010, , Page 6439-6457

https://doi.org/10.30684/etj.28.21.18

Abstract

This work is concerned with experimental and finite element investigation to determine the temperature distribution in hot weather through the section of the high performance lightweight ... Read More ...

Effect of Masonry Units Type and Concrete Grouting on Compressive Strength of Prisms

Ali A. Jaber

Volume 28, Issue 13 , June 2010, , Page 2638-2653

https://doi.org/10.30684/etj.28.13.10

Abstract

Masonry is a well proven building material possessing excellent properties interms of appearance, durability and cost in comparison with alternatives.However, the quality of the masonry ... Read More ...

Keywords = mortar

Using Polyethylene Glycol to Produce Self Cured Cement Mortar

Abstract

Effect of Nano TiO2 Additives on Some Properties of Out Door Building Unites

Abstract

Studying the Effect of Nano Additives and Coating on Some Properties of Cement Mortar Mixes

Abstract

Characterization of Nano Powder Incorporated for Building Applications

Abstract

High Performance of Silica Fume Mortars for Ferrocement Applications

Abstract

Thermal Analysis of High Performance Lightweight Concrete Sandwich Panels

Abstract

Effect of Masonry Units Type and Concrete Grouting on Compressive Strength of Prisms

Abstract