Abstract : Despite the application of wormhole concretionary laterite stone masonry in the construction industry, the subject lacks adequate information within the scientific community. Also, there is currently a controversy around the influence of mortar grades on the compressive strength of masonry. As much as some authors assert that mortar strength considerably improves masonry strength, others argue that the increase is minimal. Consequently, this study delved into appraising the compressive strength, deformation capacity, and bond strength of laterite stone masonry bonded with cement, lime, and cement-starch mortar. The evaluation was carried out experimentally. The results revealed average compressive strengths of 15MPa, 16MPa, and 13MPa for cement, cement-lime, and cement-starch mortar, respectively, exceeding the 12.4 MPa minimum requirements by ASTM C270. The bond analysis presents cement mortar masonry as having superior bond strength (0.38MPa) compared to cement-lime and cement-starch mortars (0.036MPa and 0.046MPa), respectively. This implies that real-world lateral forces will be better resisted by laterite stone masonry built with cement mortars. Moreover, on average, cement mortar masonry was found to top in compressive strength (1.4MPa), followed by cement-lime (1.28MPa) and cement-starch (0.58MPa), indicating the impact of mortar on the strength of masonry. The average deformations for laterite stone masonry bonded with cement, cement-lime, and cement-starch mortar were 18.88mm, 11.59mm, and 28.19mm, respectively. Decisively, the three types of masonry are recommended, but cement-lime is deemed economical and efficient, although the compressive strength is minimally compromised with the addition of lime. The use of lime also contributes to the reduction of the carbon footprint..
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Abstract : Column One of the most important structural components, columns transfer the weight to the foundations immediately. Therefore, their exposure to any variables or any severe conditions, such as corrosion, may result in the columns buckling, which might lead to the structure collapsing. This manuscript aims to investigate how steel fiber and type of water may reinforce for R.C. columns. In the last few years, the use of steel fiber has been verified in reinforcing. Many researchers have examined concrete beams, columns, and slabs. Investigating the impact of using fiber reinforcement reinforcing polymer on the strengthening of R.C columns after mixing with variable water (fresh water, sea water, and 50% fresh water +50% sea water) is one of the key goals of this study. Twelve short columns made of reinforced concrete make up the experimental program. Nine columns with varied weight percentages of steel fiber (16%, 33%, 50%) from total Required RFT were examined, three of the twelve specimens were evaluated solely, 100% Pure water was considered for the other three specimen one column served as the control column and was tested then. Also pouring 18 cubic and 12 cylinder (3 specimen seawater, 3 specimen pure water,3 specimen”50% seawater +50% pure water) were examined in 7 day and the same number for 28 days to consider strength in our experiment. we observed that using sea water in mix raised the effect of compressive It’s calculated that the load bearing capability of reinforced concrete columns was found to be decreased by adding steel fiber in various volume of glass fiber, according to experimental date..
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