In projects, some fiber materials such as paper, hemp fiber and straw are added to concrete. If plastering mortar is added into mixer, it can play the role of skeleton, improve the crack resistance and tensile strength of the plaster layer and enhance the flexibility of floated coat and durability in order to reduce floated coat contraction and make it not easy to fall. The characteristics of the fiber material will be introduced as follows: firstly, paper reinforcement includes dry and wet paper. Dry paper is use at the time of adding quick lime, It was tore up, was removed dust and soaked with water, and then 100 kg lime and 2.75 kg paper are mixed. When using, it should be made into powder by a small steel mill and 3 mm aperture sieve filter. When wet paper reinforcement (commonly known as pulp) was used, each 100 kg lime should be added into 2.9 kg wet paper reinforcement. Specific operation method is the same as that of dry paper. Secondly, the use of hemp fiber requires tenacity and purities. To make is loose, it need to be dried, linen and then it is cut into 20 mm to 30 mm. Each 100kg lime adds 1kg loose hemp which is hemp fiber grey. Thirdly, grass stalks are usually cut into rice straw or wheat straw which is no more than 30 mm long. It could be used after half a month after soaked in lime water. It also can be used as paper after soaked in lime or caustic soda. Fourthly, synthetic fiber mainly includes polypropylene fiber and nylon fiber used for mortar. When using, you should pay attention to its disparity and alkali resistance. These are the all material fiber used in concrete. You should be familiar with the characteristics of the material in order to make better use of it.
