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10.After construction brick wor should be well watered for a period of about two to three weeks if lime mortar is used and for about one to two weeks if cement mortar is used.
3.2.5Cracks in a Brick Masonry Wall
In most of the structures cracks appear in a brick masonry wall doue to the following reasons:
1. Combining the vrickwork with other materials having greater deflections and strains.
2. Effect of deflection and shrinkage of the concrete slabs resting on walls.
3. Development of internal forces due to moisture absorption,temperature variations,etc.
The measures to prevent cracking in masonry walls are given below:
1. The foundation supporting masonry walls should be designed with sufficient stiffness.
2. The provision of horizontal and vertical expansion joints in the walls helps in reducing the occurrence of cracks.
3. The usage of concrete with low shrinkage characteristics also prevents cracking.
4. It is preferable to have short spans for the floor slabs.
3.3 STONE MASONRY
Another type of commonly adopted masonry is the stone masonry.The stones to be used must be hard ,durable,tough and free from any defects.
3.3.1 Technical Terms
The technical terms in stone masonry are illustrated in Fig .3.8.
图 Stone masonry Coping Throating Wealthering
Plinth Ground filling level Brick masonry.
Fig .3.8 Terms in stone masonry
中文翻译:
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10.工程结束后,如果使用的是石灰混泥土应中对砖块进行两周或者三周的喷水,如果使用的是结合济混泥土,应对砖块进行一周或者两个的喷水。
3.2.5 在灰浆土砖墙出现的裂缝
大多数在灰浆土砖墙中出现的结构性裂缝应为如下的原因:
1. 将VRICKWORK和其他材料连在一起容易有更多的弯曲和压力
2. 墙上混泥土板的偏斜或者缩水
3. 因吸收水分引起的内压的扩大,气温的变化等等
防止灰浆土砖墙中出现裂缝的方法如下:
1. 灰浆土砖墙的建造设计中使用足够硬的硬度
2. 在墙上提供水平和垂直扩张汇集点帮助减少裂缝的出现
3. 使用少缩水的混泥土也可防止裂开
4. 使用跨度小的基层板更好
3.3 石砌
3.4 在石砌中经常使用的另一种混泥土。使用的石头必须坚固、耐用、没有缺点。
3.3.1专业术语
在石砌法中使用的专业术语如图3.8所示
图 石砌 墙压顶 THROATING WEALTHERING 柱基 地基 填充点 砖块混