I'm investigating the relative differences in stress of cement when expanding and contracting, I understand that cement can take significantly more stress and strain when contracting rather then expanding however -Does this line have the same gradient (ie youngs modulus) as that when Cement is expanding
I'm investigating the relative differences in stress of cement when expanding and contracting, I understand that cement can take significantly more stress and strain when contracting rather then expanding however -Does this line have the same gradient (ie youngs modulus) as that when Cement is expanding To cause cement to contract, a force is applied toward the surface of the cement. A building is supported by a cement foundation. The weight of the building is pushing down on the top surface of the cement, and the ground under the foundation is pushing up on the bottom surface of the cement. The cement foundation is composed of rocks and mortar. The mortar is the adhesive which bonds the rocks to each other. The weight of house is attempting compress the rocks and mortar. The compressive strength of the rocks is very high, so the rocks do not significantly. If a concrete beam is used to lift a large weight, tension force is attempting to expand the cement. The tensile strength of the mortar is very low, so the rocks separate from each other as the bond between the rocks and mortar, glue, break.
