University of Fallujah

About: University of Fallujah is a education organization based out in Baghdad, Iraq. It is known for research contribution in the topics: Compressive strength & HOMO/LUMO. The organization has 117 authors who have published 113 publications receiving 435 citations.

Properties of eco-friendly pervious concrete containing polystyrene aggregates reinforced with waste PET fibers

Abstract: A huge amount of expanded polystyrene (EPS) and PET plastics are produced every year all around the world. However, if not treated properly, after their consumption, EPS and PET caused numerous environmental problems. Therefore, the utilization of these wastes in concrete production can contribute to the sustainability of construction materials. This experimental study aims to investigate the behavior and properties of pervious concrete incorporating both EPS aggregates and waste PET fibers. A total of ten concrete mixtures were designed with different percentages of PET fibers and the same amount of EPS content. The investigated parameters included: abrasion resistance, dry density, compression as well as flexural strength, porosity ratio and water permeability coefficient. From the results obtained in this study, it has been shown that the proposed mixes are reliable to use in the construction field. The compressive strength, abrasion resistance and density decreased by incorporating EPS and PET fibers. However, the flexural strength increased by using PET fibers up to 1% in volume. On the other hand, the porosity ratio and the water permeability coefficient increased through the addition of PET fiber. The empirical models among different properties were also provided. This experimental study can be contributed to promote sustainable construction materials as mixtures contained a considerable amount of waste materials.

Properties of Eco-Friendly Concrete Contained Limestone and Ceramic Tiles Waste Exposed To High Temperature

Abstract: In this recent work, ceramic tiles wastes (CW) were utilized as coarse aggregates in different weight fraction ratios starting with 10% till 100% at an increment of 10% in production of normal concrete. Also, 5% of cement weight was substituted via using limestone powder (LP). Slump value, fresh and dry density, absorption ratio and compressive and splitting tensile strengths were tested at 25 °C. As well, dry density and compressive and splitting tensile strengths were found after exposing the specimens to three target temperatures (200, 400 and 600) °C for 2 h. The results indicated that the usage of CW led to enhancing compressive and splitting tensile strengths at room temperature and the maximum increases in these strengths for 60% of CW, which were 164% and 128%, respectively, compared with normal concrete without CW and LP. The usage of CW enhances behavior of mixes exposed to high temperatures. The maximum remaining compressive strength ratios of tested series exposed to 200 °C and 400 °C were 0.882 and 0.804, respectively, for mixes made by using 50% of CW, and the maximum residual compressive strength ratio for series exposed to 600 °C was 0.780 for mix containing 70% of CW. Maximum remaining splitting tensile strength ratios of three series exposed to (200, 400 and 600) °C were 0.969, 0.895 and 0.836, respectively, for mix containing 70% of CW. The obtained results can give indication of producing environmental concrete with enhanced mechanical properties via using ceramic waste.

Preparation, spectral and thermal properties of new Isoflavone derivatives: mesomorphic properties and DFT studies

Abstract: The four new homologous series of symmetric Isoflavon dimers were synthesised using varied alkyl/aryl diamines in linear sense. The chemical structures of the molecules were characterised by IR, NM...

CFRP for strengthening and repairing reinforced concrete: a review

Abstract: Carbon fibre-reinforced polymer (CFRP) is an emerging reinforcement in concrete materials and possesses many attractive mechanical and physical characteristics. Amongst other mechanical properties, CFRP has good compressive, flexural and shear strengths, and its usage improved ductility and suitability for preventing cracks. Thus, the application of CFRP is increasing in the construction industry. This review work highlights the effect of CFRP reinforcement on mechanical properties of reinforced concrete (RC) and self-compacting concrete (SCC) members. The scope of this review work is to highlight the effect on strengthening and repairing of RC members and SCC reinforced with CFRP material. A variety of research work has been reviewed on the use of CFRP in RC members, but the data remain limited yet. Thus, the critical review has been conducted from last 2-decades research on CFRP reinforcement in RC and SCC, and almost 60 researches and review articles have been involved in this discussion. The reviewed articles indicated that CFRP reinforcement can be suitable for the strength enhancement of RC members considering the strength-to-weight ratio despite its failure to produce more strength than steel reinforcement. Furthermore, CFRP is a good choice for repairing RC members due to its easy installation and other characteristic values. Therefore, CFRP reinforcement, which offers resistance to cracking, corrosion and temperature, is the best choice for concrete production.