Haider A. Abdulhameed

University of Technology-Iraq

This paper presents the thermal behavior simulation of high-strength high-volume fly ash nano-silica (HSHVFANS) reinforced concrete (RC) slab exposed to various fire curves using finite element (FE). The experiment includes a medium-scale furnace test (ISO 834 fire curve load, 120 min) of the HSHVFANS RC slab. Results show locations and depths of c...

Several stress-strain models were used to predict the strengths of steel fiber reinforced concrete, which are distinctive of the material. However, insufficient research has been done on the influence of hybrid fiber combinations (comprising two or more distinct fibers) on the characteristics of concrete. For this reason, the researchers conducted...

Cement mortar rendering suffers from cracking due to shrinkage. This research aims to find the optimum content of chopped rubber tires that can be added as fibers to cement mortar to improve their properties. The chopped fibers were added to the mortar mix at two sizes, first passing sieve 4.75 and remain on 2.36 mm (group 1). While the other passi...

Steel–concrete–steel (SCS) structural systems have economic and structural advantages over traditional reinforced concrete; thus, they have been widely used. The performance of concrete made from recycled rubber aggregate from scrap tires has been evaluated since the early 1990s. The use of rubberized concrete in structural construction remains nec...

Composite steel-concrete sections have a broad benefit through increasing structural strength as well as minimizing the self-loads. All past researches were concerned with pre-installed shear connectors (PRSC) in the manufacturing of composite sections. A new fabrication technique for steel-concrete-steel composite sections were presented in the cu...

For more than a decade, externally bonded carbon fiber reinforced polymer (CFRP) composites successfully utilized in retrofitting reinforced concrete structural elements. The function of CFRP reinforcement in increasing the ductility of reinforced concrete (RC) beam is essential in such members. Flexural and shear behaviors, ductility, and confinem...

The use of fiber-reinforced self-consolidating concrete (FR-SCC) in repairing damaged concrete beams has been evaluated. An experimental program was conducted to design and test key fresh and hardened properties of SCC and FR-SCC mixtures. The designed FR-SCC mixtures included two types of supplementary cementitious materials (silica fume (SF) and...

The use of high early strength materials minimizes the out-of-service time of the effective repairs. In this research, high early strength fiber reinforced rapid set materials (HES-FR-RSM) were developed for concrete repair applications in transportation infrastructures with low cracking potential. Three types of rapid set prepackaged repair materi...

The use of high early strength materials minimizes the out-of-service time of the effective repairs. In this research, high early strength fiber reinforced rapid set materials (HES-FR-RSM) were developed for concrete repair applications in transportation infrastructures with low cracking potential. Three types of rapid set prepackaged repair materi...

The combination of drying shrinkage of the new applied repair material and the restraint in the repair system will often lead to cracking. Therefore, the restrained shrinkage in the repaired system becomes a major concern in the repair concrete industry. In this paper, the effect of drying shrinkage for the new applied repair material was modeled...

The efficiency of a given repair depends on both the repair material quality and the ability of the material to fill the section to be repaired, especially in congested areas. Fiber-reinforced self-consolidating concrete (FR-SCC) can be placed easy compared to conventional FRC. In addition, (FR-SCC) can improve tensile and flexural strengths while...

In this study, the bond strength between concrete substrate and three types of repair materials by three different test methods was examined. The repair materials were conventional mortar(MC), high reactivity metakaolin mortar (MHRM) and silicafume mortar (MSF).MHRM and MSF were prepared by admixing 8%HRM and 8%SF(as a partial replacement by weight...

In this study, the compatibility of polymer modified repair mortar and substrate concrete was investigated in three stages. First stage includes studying the individual properties of polymer and conventional repair materials, and also two types of concrete, such as compressive strength, split tensile strength, and flexural strength using standard A...