Key points of construction process quality of washed stone
The information comes from:the Internet posted on:2021-12-28
1. Process requirements
1. Grassroots treatment: the pollution on the surface of the grassroots should be cleaned up; after finishing the construction of the edge material, the grassroots should be cleaned, and the surface layer position should be reserved for 1:3 according to 4 times the particle size of the washed stone (not less than 20mm, not more than 30mm) Cement mortar leveling construction, the leveling thickness is more than 30mm using C25 fine stone concrete leveling, the expansion joints of the leveling layer are aligned with the expansion joints of the base layer; the setting of the expansion joints is not more than 3 meters as the standard.
2. Raw material requirements: The specifications and colors of the raw materials meet the design requirements, and the materials with full particle size and roundness are selected, and the impurity content of the materials does not exceed 1%.
3. Material mix ratio requirements: According to design requirements, site construction requires uniform mixing. If there is no special requirement, general stone: cement should be mixed according to 1:2.5~3; according to the color requirements of the design, add pigments and color. Require a dedicated person to be responsible to ensure the unity of the overall effect.
4. The setting of expansion joints: the setting requirements of the expansion joints of washed stone and the expansion joints of the basic structure are uniformly corresponding, and the distance is not more than 3 meters.
5. Control the cleaning time: the materials are stirred evenly. After the paving is compacted, the cleaning can only be carried out when the initial setting reaches a certain strength. Generally, it is advisable to press the fingers and there are no obvious fingerprints. , So as not to reduce the strength of the surface layer, the exposed stones should not exceed 1\4 of the particle size of the stones to ensure the connection strength of the stones.
6. Protection: After the cleaning is completed, a fence is set on the periphery for closed maintenance, and the surface is completely covered with a clean film after the water stains are dried; after the strength is fully reached the design requirements, the surface is cleaned, and the special paint is completely painted for 2 degrees , So that it shows the formation of a complete oil film protection layer.
2. Common faults and prevention in the construction of washed stone floors
1. Settlement and fracture: Expansion joints are not set or set not standard; Preventive measures: The expansion joints of the surface layer should be set corresponding to the base layer, and the setting distance should be controlled within 3M;
2. Uneven arrangement of stones: uneven mixing of materials or failure to meet the requirements of the mix ratio; preventive measures: strengthen the mixing of materials, and properly supplement the stones before the initial setting of the raw materials after paving.
3. Color blocks are inconsistent in color: the number of pigments mixed in is not uniform; preventive measures: special personnel and special management, reserve color swatches, and strictly reconcile the color swatches.
4. Threshing: selection of raw materials and excessive cleaning; preventive measures: strengthen the quality control of raw materials, choose stones with round particle size; if the strength is not reached during cleaning, control the cleaning time, and do not over-clean under the premise of ensuring quality.
5. Empty drum: the grassroots is not cleaned; preventive measures: the grassroots is cleaned, rinsed and dried before the surface construction; the grassroots and the surface are brushed with cement slurry.
