This paper reports the results of an experimental program to investigate the bonding behaviour of two different types of anchorage systems for externally bonded FRP laminates for strengthening one way RC slab, mechanicaland fiber anchorage system. The overall experimental program consisted of seven flexure tests on RC slab specimens strengthened with a mechanical anchorage system and another seven flexure tests on RC slab specimens strengthened with a fiber anchorage system. The influence of different types of anchorage systems, numbers of anchors and anchor spacing are studied in this paper to evaluate the behaviour of strengthened one-way slabs. The performance of each anchorage system is presented, discussed, and compared in terms of deflection, debonding mode, and failure mode. General from the experimental results, it is found the anchorage system significantly reduces the slab deflections and increases the slab strength and slip capacity, in comparison with unanchored control slabs. The findings indicate that the mechanical technique could represent a better alternative to the fiber anchorage technique because it allows debonding to be more delayed, and hence FRP tensile strength to be better exploited.

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This study is to investigate experimentally fire resistance of flat slab manufactured using recycled crushed ceramics as coarse aggregate. From an economic point of view, this experiment is costly; however, if it managed and done correctly it can save raw materials, and conserve natural resources. The test is carried out on six slabs measuring 1.65*1.65*0.15m tested under flexural load exposed to fire under load for about 120 min. Two slabs were control without recycled ceramics aggregate, one slab with recycled ceramics aggregate with ratio of 35%, and three slabs with different ratios of 20%, 35% and 50% cast in layers such that the lower layer which was exposed to fire contains crushed ceramics, and the upper layer from ordinary concrete. This paper examines the feasibility of using ceramics wastes in concrete. The behavior of R.C flat slabs manufactured with recycled crushed ceramics was similar to that the normal concrete.

The construction system of load bearing wall is a widespread system where it is an economic and easy to implement method. The most important construction materials used in building walls bearing system are (stone, clay unit, calcium silicates units and concrete masonry units), in this research it has been studied the behavior and strength of limestone. Limestone found in vast areas of the Egyptian deserts such as the Giza, Saqqara, Tourra, Matrouh and Minya. Therefore, an experimental program consisting of three stages was developed. The first stage includes testing units of limestone to determine their physical and chemical properties. In the second stage, building masonry prisms constructed from limestone used two types of mortar no.1 and 4 mixed according to the Egyptian code for designing and executing masonry works, where the tests conducted (compressive strength, shear strength, tensile strength, in plane and out of plan). As for the third stage, it includes testing six walls under the influence of axial load, as these walls are divided into two groups: the first group was built by using mortar no. 1, while the second group was built by using mortar no. 4; each group is divided into three types of walls. The first type was a solid wall; the second was a wall with a window opening, while the third was a wall with a door opening. The results showed that the compressive strength of walls that were built by using mortar no. 1 is better than those that were built by using mortar no. 4

This paper examines the feasibility of replacing natural aggregate with recycled crushed ceramics in R.C flat slabs. Nowadays, many researchers are trying to use recycled ceramics as coarse aggregate in manufacturing concrete structures to decrease waste construction materials, and save raw materials. The experimental work was carried out on six slabs measuring 1650 x 1650 x 150 mm with a connected central column tested for punching shear. One slab was control without recycled ceramics aggregate; five slabs with recycled ceramics aggregate with different ratios of 20%, 35%, 50%, 60% and 70% were used.