Building technology co. , LTD built: high strength grouting material construction of freezing-thawing resisting test analysis

High strength grouting material high strength grouting material manufacturer high strength grouting material price construction technology co. , LTD. , freezing-thawing resisting sexual high strength grouting material of winter construction test is very important, one is to ensure that the engineering construction quality, the second is to make sure under what conditions can normal construction, there is no measurement service grouting material standard test method for resistance to freezing and thawing cycle ability. In architectural technology co. , LTD. After years of trial performance of two kinds of grouting material resistant to accelerated freeze-thaw cycle test method. 1, freezing and thawing are in the water; 2, freeze and melt in the water in the air. Saturated grouting material freezing damage in water than in air is much more serious, at the beginning of the test specimen saturation will degradation rates of the grouting material. The British standard BS water grouting material freezing and thawing test method is also given. There are several kinds of high strength grouting material damage assessment method. Is a commonly used method is the variation in move mode of specimen, after several times of freeze-thaw cycle to specimen move mode of lower value indicates that the damage rate of the grouting material. Change method can be found with the naked eye or other methods cannot be observed not obvious freeze-thaw damage, even though in explaining the early a few cycle caused by elastic modulus decrease when there are still some problems. Building technology co. , LTD. High strength grouting material component of freezing and thawing cycles and not easily measured. Atmospheric temperature record is not enough. For example, in the cloudy sunny days, the situation is more complicated. By direct hc40 grouting material specification sunlight grouting material surface temperature of 10 ℃ higher than atmospheric. When the sky is full of clouds, grouting material to cool. So 1 d will zhengzhou grouting material manufacturer in straight for a few cycles. These are influenced by solar radiation Angle, so the grouting material toward the south side of the victims. Rapid temperature change can form on the surface of the grouting material harmful temperature gradient. As already mentioned, in some northern areas, each year only one circle: the cycle for six months. Send me according to the durability index to judge whether or not to use the standard have not advice; Durability index, therefore, the main polyurethane grouting materials used in all kinds of grouting materials and the comparison between, especially there is only one parameter ( Such as aggregate) Change the properties of grouting material. However, from the division of the durability index can still get some guidance: durability index < 40, freezing-thawing resisting sexual said grouting material is not in conformity with the requirements; The 40 - for durability index 60, freezing-thawing resisting sexual said grouting material in a stage of doubt; Durability index > 60, freezing-thawing resisting sexual said high strength grouting material can meet the requirements; Close to 100, freezing-thawing resisting sexual grouting material is expected very satisfactory.