1. The basic treatment shall clean the basic surface of the equipment, and shall not have debris such as gravel, floating pulp, dust, oil and release agent. The base surface of the equipment should be fully wetted 24 hours before grouting. 1 hour before grouting, water should be drained.
2. Determine the grouting method According to the actual situation of the equipment base, select the corresponding grouting method, and grout can be carried out by "self-weight grouting", high-position funnel grouting or "pressure grouting" to ensure that the slurry can fully fill all corners.
3. The mold supports the template according to the determined grouting method and the grouting construction drawing. The template positioning elevation should be at least 50 mm above the upper surface of the equipment base, and the template must be tightly and stably supported to prevent loosening and slurry leakage.
4. The stirring of the grouting material is stirred according to the water adding amount of 12%-14% of the weight of the grouting water, and the water temperature is preferably 5-40 °C. The mechanical agitation time is generally 1 to 2 minutes; when manual agitation is used, it is preferred to add 2/3 of water for 2 minutes, then add the remaining water and continue to stir until uniform.
Grouting
The slurry should be poured from one side until the other side overflows to facilitate the discharge between the equipment base and the concrete foundation.
The air is used to enrich the grout and it is not allowed to grout from the four sides at the same time.
(2). It is not suitable for vibrating during the grouting process. If necessary, the bamboo slats can be used to pull the diversion.
(3) During the grouting construction process, the grouting layer should be protected from vibration and collision until the mold is removed, so as not to damage the unfilled hard grouting layer.
6. Maintenance (1) Within 30 minutes after the completion of grouting, the curing agent should be sprayed immediately or covered with plastic film and covered with rock wool quilts for maintenance, or immediately after the final setting of the grouting layer, watering and moisturizing.
(2) During the winter construction, the maintenance measures shall also comply with the relevant provisions of the current “Regulations for the Acceptance of Construction of Reinforced Concrete Projects†(GB50204).
(3) The curing time and demoulding time are different under different temperature conditions.
Note: 1. Compressive strength according to: "GB177-85 cement mortar strength test method": expansion rate according to: "GB119-88 concrete admixture application technical specifications."
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Editor: (Hardware Business Network Information Center) http://news.chinawj.com.cn
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