如何检查现场砖块的质量？

砖是建筑物的基础。如果结构中使用的砖块不好，则可能导致严重的建筑物损失。因此，必须在任何建筑活动中使用砖之前检查砖的质量。我们可以在现场进行一些现场测试，以检查砖的质量。这些测试如下。

1. Water Absorption
2. 视力检查
3. Efflorescence
4. 方面
5. 硬度
6. Soundness
7. 结构

Field Tests on Brick to Check Quality

1.吸水

取5砖，将砖块称重，并计算出5块砖的平均干重。然后将砖块浸入水中24小时。浸入24小时后，再次称重砖，平均计算5块砖。最终平均重量和初始平均重量的差异表明砖吸收的水量。在任何情况下，它都不应超过干砖平均重量的20％。

2. Visual Inspection

In this test bricks are closely inspected for its shape. The bricks of good quality should be uniform in shape and should have truly rectangular shape with sharp edges.

3.流出

这个测试应该进行通风良好room. The brick is placed vertically in a dish 30 cm x 20 cm approximately in size with 2.5 cm immersed in distilled water. The whole water is allowed to be absorbed by the brick and evaporated through it. After the bricks appear dry, a similar quantity of water is placed in the dish, and the water is allowed to evaporate as before. The brick is to be examined after the second evaporation and reported as follows:

• 零：当没有可感知的盐沉积时
• Slight: When not more than 10% of the area of brick is covered with salt
• 中度：当沉积沉积物覆盖砖块的50％时，但由于表面的粉末或剥落而无人陪伴。
• Heavy: When there is heavy deposit covering more than 50% of the area of the brick accompanied by powdering or flaking of the surface.
• 认真：当盐沉积大量时，伴随着粉末和/或表面剥落，这种沉积往往会增加样品的重复润湿。

通用结构的砖不应具有轻微到中等的排放。

4.尺寸公差

随机选择20块砖以检查长度，宽度和高度的测量。如图所示，这些尺寸应以每个十个次数的衡量。尺寸的变化仅在狭窄的范围内，一级的差异为±3％，其他类别的差异为±8％。

5.硬度

在此测试中，借助指甲在砖块上进行划痕。如果表面没有留下印象，则将砖被视为足够硬。

6.健全性

Two bricks are taken, one in each hand, and they are struck with each other lightly. A brick of good quality should not break and a clear ringing sound should be produced.

7. Structure

A brick is broken and its structure is examined. It should be homogeneous, compact and free from any defects such as holes, lumps etc.