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Expansive Chemical Co., Ltd(ECC)
Add:Xiangyang Road,Loudi Hunan,P.R. China
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Tel: +86-738-8761179
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Silent expansion agent (broken agent) the provisions of the use of summary
2017-9-28 15:58:08
(1) expansion agent (breaker) does not belong to dangerous goods. Therefore, in the purchase, transportation, storage and use, without any restrictions
(2) safety of construction process. There is no blasting vibration generated when air shock wave, flying stone, noise, toxic gases and dust hazards.
(3) simple construction. The crusher is mixed with water and can be plugged into the hole without clogging.
(4) break is broken, need to stay. As required, appropriate parameters are designed to achieve the purpose of splitting and cutting rock and concrete in a planned way. Static crushing method (static blasting technique) is a new method of breaking (or cutting) rock and concrete developed in recent years, also called static forcing and static crushing technology.
1, the principle of inorganic salt powder containing molybdenum, titanium, magnesium, calcium and other elements of the static breaking agent, with the amount of water transferred into a flow like slurry, directly poured into the borehole, the hydration reaction, the crystal deformation, with the growth of time have a huge expansion pressure (radial compressive stress and circumferential tensile stress), slowly and quietly imposed on the hole wall, after a period of time to achieve the maximum value, the concrete or rock burst, broken. Because generally disintegrated rock or concrete is brittle material, the compressive strength and tensile strength of brittle material are small, and the tensile strength of brittle material is much less than compressive strength. The tensile strength of the rock is 4 -10Mpa, and the tensile strength of concrete is about 1.5 - 3.0Mpa, approximately equal to the compressive strength of 1/10 - 1/20. Normally, the expansion pressure of the static breaker can reach 30 - 50Mpa. Therefore, a reasonable crushing design (charge, pore size, Kong Shen and hole spacing) is to enable the media around the hole to be fully damaged. As long as the constraint continues to exist, the breaking agent has the property of continuously producing or remaining a certain degree of expansion pressure and thus can continue to increase or produce new cracks. When the temperature is 20 degrees centigrade and the ratio of water to breaker is 0.3:1, the volume will expand four times freely.
2, scope of application
(1) crushing and dismantling of concrete and masonry structures;
(2) fragmentation or cutting of various rocks. Or make two breaks. But it is not applicable to porous bodies and tall structures.
3, advantages: (safety, convenience)
(1) crushing agent does not belong to dangerous goods. Therefore, in the purchase, transportation, storage and use, without any restrictions.
(2) safety of construction process. There is no blasting vibration generated when air shock wave, flying stone, noise, toxic gases and dust hazards.
(3) simple construction. The crusher is mixed with water and can be plugged into the hole without clogging.
(4) break is broken, need to stay. As required, appropriate parameters are designed to achieve the purpose of splitting and cutting rock and concrete in a planned way. However, the scope of static fracture agent has some limitations. Compared with the same, the energy is not as large as the drilling hole, and the crushing effect is greatly affected by the temperature and the experience of construction personnel. It does not show its superiority in the environment where blasting methods are not allowed.
4, the static cracking agent in 1968 the history of the Japanese into the Construction Technology Research Institute Tanaka Hideo, a patent to the theme of "broken" method of concrete structure, the main content is: the results of CaO or MgO with water after mixing to the filling hole, caused by the volume expansion pressure using slurry hydration reaction the destruction of buildings. This is the earliest static breaking agent. Later, Japan's Onokazu, Sumitomo and other companies have also done a lot of experimental research and success. At present, there are at least five kinds of static crushing dose sold on the Japanese market, and the applicable temperature is between -5 and 35. Since the beginning of 80s in China, it has also been developed successfully.  However, due to the market, raw materials, technology, system and other reasons, the static fragmentation of this product has not been further developed. In the past two years, with the use of restrictions and environmental protection requirements, static fracturing agent more and more people's favor.
5. The relationship between the expansion pressure and temperature is closely related to the speed of the hydration reaction of the broken agent and the temperature. I plant did not implement the "order type" production before the spring and autumn type static breaking agent applicable temperature between 10 DEG ---25 DEG, even in this range, if in use temperature of 13 degrees and 20 degrees, the expansion pressure was doubled at the same time. As a result, the drought, middle and late filling of the day have a great influence on the crushing effect.
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