Department of Civil Engineering
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Browsing Department of Civil Engineering by Author "AL-SALIHI, ALI FAROOQ MOHAMMED SALIH"
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Item EFFECT OF WATER CONTENT ON THE STRENGTH PROPERTIES OF KUFA LIMESTONE QUARRY(2022-01-26) AL-SALIHI, ALI FAROOQ MOHAMMED SALIH; Özgenoğlu, Abdurrahim; Al-Adilee, Amjad Ibrahim FadhilWater content has a negative effect on both physical and mechanical properties of rock materials and rock masses. The influence of water on the mechanical behavior of rocks can be problematic for the stability of rock mass in different civil and mining structures. The main objective of this thesis is to investigate the effect of water content on uniaxial compressive strength and indirect tensile strength of limestone of Kufa quarry. This thesis also relates the uniaxial compressive strength to indirect tensile strength test to use indirect strength tests to estimate the strength of specimens as a function of degree of saturation to use it in design and classification purposes of Kufa quarry limestone in Iraq. Furthermore, meaningful relationships between degree of saturation of specimens with uniaxial compressive strength, deformability parameters, and both of point load strength index and Brazilian test were developed. One hundred and twenty five specimens collected from the same zone in Kufa quarry limestone in Iraq were prepared for some mechanical tests according to American Society for Testing Materials (ASTM). Their physical properties were determined (bulk density, porosity, and specific gravity) and tested under uniaxial compressive, point load, and indirect tensile tests for different degree of saturations (0%, 25%, 50%, 75%, and fully saturated).According to the results a significant decrease was observed in strength test results and modulus of elasticity with an increase in water content. The maximum decreases in uniaxial compressive strength, point load strength index, Brazilian test, average and tangent modulus of elasticity were determined as 33%, 80%, 75%, 87% and 74% respectively for fully saturated specimens.Empirical equations developed as correlations between the uniaxial compressive strength and tensile strength, point load strength index, and modulus of elasticity under the five degrees of saturation. Another correlation obtained between the degree of saturation with compressive strength, tensile strength, point load strength index, also the modulus of elasticity. As well as a correlation between tensile strength and point load strength index were developed. Point load strength index has a better correlation with uniaxial compressive strength than Brazilian tensile strength. The correlation between point load strength index and Brazilian tensile strength was not good.