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Winter is so cold, what about waterproof construction?

Published on: November 26, 2019 source: Dianbao waterproof building materials [font: large in Small

? ? In the long winter, especially in the north, it is common that there is no rain for one or two months. Compared with the rainy summer, the dry indoor and outdoor environment in winter creates waterproof

There are more advantages. this It's a good time for people, places and businesses. ?

So for waterproofing, as long as the construction temperature is not lower than 5 ℃, and take certain insulation facilities, the construction is no problem. And Dianbao's waterproof coating is general

Dujing If the low temperature performance test is too strict, the quality will not be affected as long as there is no freezing damage during transportation and storage. However, attention should be paid to the following points during construction:

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Preservation of products

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In cold winter, the preservation of products is particularly important. Dry powder products are especially easy to absorb moisture, and the emulsion part of waterproof products is easy to freeze and freeze under low temperature. Therefore, to ensure the safety of products in winter, the key points are as follows:

1. The products should be placed in a warm and dry place, and there should be no water or leakage in the warehouse. If possible, it is better to do a moisture-proof treatment;

2. Especially cold areas such as warehouse basement can be properly heated and insulated. In other areas, sponge, blanket and other materials can be used to cover or insulate the products.

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Construction environment

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1. The construction environment temperature should be higher than 5 ℃ and the construction base surface temperature should be greater than 5 ℃. If the base surface temperature is less than 5 ℃, freezing, frosting and snowing, construction is strictly prohibited;

2. Pay close attention to the weather change, the relative humidity should be less than 85%, outdoor construction is strictly prohibited in rainy days;

3. The operation shall be stopped 24 hours before the cold current comes, and the construction shall not be carried out when the ambient temperature is lower than 5 ℃ for 48 consecutive hours.

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Base treatment

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1. During the construction of waterproof coating in winter, the base surface shall be clean, neat and smooth without cement laitance, oil stain and other sundries. The concrete base surface shall be cleaned to make the slurry closely jointed, which is conducive to the formation of waterproof coating film.

2. Check whether there are structural defects. The honeycomb, holes, cracks on the base surface and the periphery of the upper and lower water pipes shall be filled and smoothed with leakage stopping materials, and the sharp edges and protrusions shall be removed.

3. Before construction, the working face shall be thoroughly moistened with clean water to form internal saturation. However, the base surface shall be kept free of open water. In winter construction, one section of wetting shall be done.

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Construction method

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1. Mix the ingredients according to the liquid material and powder proportion marked on the product package. Mix well with stirrer.

2. Use the cross method to brush, first according to the order from top to bottom, from left to right for local painting. Under the premise of ensuring the coating thickness and the recommended amount of application, multi-layer thin brush is recommended for winter construction, in order to prevent the coating layer from cracking due to excessive thickness and uneven moisture drying. In addition, the slurry is too thin or stirred unevenly, easy to powder or shell;

3. The wet water quantity should be reduced properly when the waterproof coating is applied. The air temperature is low in winter and the air is dry. The evaporation of many base surfaces is not large, so the wet water volume will be different from that in summer.

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Construction time

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When the ambient temperature is lower than 5 ℃ for 48 consecutive hours, it is not suitable to carry out construction. If it is necessary to carry out construction due to the need of construction period, the construction time can be arranged between 10:00-15:00 in sunny weather, and warm water (or hot water) can be used to mix materials and carry out rapid construction.

Frost should be avoided within 48 hours after construction to avoid poor film-forming and cracking caused by too low temperature during film-forming period after construction.

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