go to jove.com

HIGH SCHOOL

Engineering

Concept Videos

Civil Engineering

This is a free preview. For full access

Masonry Materials

How Mortar Performance Is Measured

Description

Mortar performance is measured by several key properties that matter in masonry work. These include workability, water retention, bond strength, durability, compressive strength, volume change, and appearance. Together, these properties help determine how well mortar can be placed, bonded, and finished.

Transcript

良好的砂浆在塑性状态下具有良好的和易性以及保水能力。

良好的和易性使砂浆能够顺畅摊铺,在垂直表面上粘附而不下垂,从接缝中挤出时不掉落,并易于定位砌体单元。砂浆的和易性还可通过其在抹刀上的滑动性能和粘附性来评估。

保水性是指防止水分向大气蒸发或被砌体单元吸收。

砂浆硬化并失去可塑性,从而产生抗拉粘结强度。

这种强度通过将砖块用砂浆粘结,养护后使用拉伸试验机将其分离来评估。

粗糙表面的结合强度通常较高,而光滑表面的结合强度通常较低。

抗压强度通过在实验室压力试验机上测试已固化的2英寸砂浆立方体,记录其破坏前的最大载荷来确定。

在建筑中,砂浆根据其28天后的抗压强度值被分为M、S、N和O四种类型...