Print ISSN: 1681-6900

Online ISSN: 2412-0758

Keywords : Polypropylene Fiber


Effect of Dual Reinforcement on Wear Resistance by Aluminum Compacts Reinforce by SiC, Al2O3

Mohammed Moanes Ezzaldean Ali; Hanan A. R. Akkar; A. K. M. AL-Shaikhli; Ali K. Shayyish; Muhsin J. Jweeg; Wisam Auday Hussain; Mohammed T. Hussein; Mohammad A. Al-Neami; Farah S. Al-Jabary; Jafar M. Hassan; Ali H. Tarrad; Mohammed N. Abdullah; Ahmed T. Mahdi; Eyad K. Sayhood; Husain M. Husain; Nidaa F. Hassan; Rehab F. Hassan; Akbas E. Ali; Assim H Yousif; Kassim K Abbas; Aqeel M Jary; Shakir A. Salih; Ali T. Jasim; Ammar A. Ali; Hosham Salim; JafarM. Daif; Ali H. Al Aboodi; Ammar S. Dawood; Sarmad A. Abbas; Salah Mahdi Saleh; Roshen T. Ahmed; Aseel B. Al-Zubaidi; Mohammed Y. Hassan; Majid A. Oleiwi; Shaimaa Mahmood Mahdy; Husain M. Husain; Mohammed J. Hamood; Shaima; a Tariq Sakin

Engineering and Technology Journal, 2009, Volume 27, Issue 13, Pages 423-429

The producing composite materials of dual reinforcement in which the matrix material is aluminum reinforced with two types of ceramic particles : which are Alumina (50μm

Keywords

composite materials; wear test ; Al2O3; SiC: Al

Performance of Fiber Light-Weight Aggregate Concrete Exposed to Elevated Temperatures

Shakir A. Salih; Ali T. Jasim

Engineering and Technology Journal, 2009, Volume 27, Issue 13, Pages 2393-2410

Two major problems arise when concrete is exposed to elevated
temperatures. One is the deterioration in mechanical properties of concrete and the other problem is spalling of concrete. In recent times, the inclusion of polypropylene fibers had been reported to be a feasible method to prevent spalling of concrete subjected to elevated temperature. Additional problems arise due to the fact that by adding polypropylene fibers, the residual properties of heated concrete
may be adversely affected. The essential objective of this work is to investigate the effect of incorporation of polypropylene fibers or/and steel fibers on the residual properties of lightweight concrete made from porcelinite aggregate after subjected to elevated temperatures. The concrete specimens heated to target temperatures of 100, 200, 400, 600 and 800 oC, at a rate of 10 oC per minute. When the target
temperature was reached, the specimens were kept at that temperature for 2 hours and then allowed to cool to room temperature by natural cooling. For each type of concrete, compressive strength, splitting tensile strength, static modulus of elasticity, and thermal expansion strains were determined before and after exposing the concrete to the target elevated temperatures. Experimental results indicated that
polypropylene fiber-reinforced LWAC showed more reduction in its residual mechanical properties compared to plain LWAC. These different are more pronounced at exposure temperature of 200 and 400 oC. Average differences of 30,25 and 20 percent were observed in static modulus of elasticity, splitting tensile strength and compressive strength respectively, for specimens heated up to 400 oC. The addition of steel fibers inside the polypropylene fiber concrete would improve
the residual mechanical properties of heated concrete at temperature range 200 to 600 oC. On average, the improvement ranged from 9 to 20 percent.

Effect of Polypropylene Fibers on Properties of Mortar Containing Crushed Brick as Aggregate

Shakir A. Salih; Maha E. AL-Azaawee

Engineering and Technology Journal, 2008, Volume 26, Issue 12, Pages 1508-1523

More recently there has been a great attention towards converting waste
materials by- products into useful materials as aggregate in concrete industry.
It is thus aimed in this study to investigate the possibility of using waste brick
as suitable materials and alternative to the natural aggregate in the production
of lightweight mortar.
The essential objective of this work is to study the mechanical properties of
lightweight mortar containing different percentages of polypropylene fiber
with high range water reducing agent. The effective synergy of this admixture
on the properties of mortars is also investigated. Compressive strength,
splitting tensile strength, thermal conductivity and drying shrinkage tests were
conducted on reference and polypropylene fiber reinforced mortar specimens
at various ages of curing (7, 14, 28, 60 and 90 days) respectively.
The results show a significant increasing in splitting tensile strength with
the increment of fibers content. Although, a considerable reduction in
workability is recorded as increasing the fiber content. Which is controlled by
using high range water reducing admixture. All mixes show acceptable values
for thermal insulation with regards to ACI 213-87 thermal insulation
recommendations.