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Ultralow-temperature resisting adhesive
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An adhesive, low-temperature technology, used in the electric power industry, can solve the problems of loss of mechanical strength of insulators, easy damage of accessories or porcelain parts, etc., to achieve good electrical insulation and mechanical properties, and improve the effect of frost resistance.
Active Publication Date: 2018-03-09
JIANGSU SOUTH PORCELAIN INSULATOR CO LTD
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[0005] There are two aspects to the harm of cement adhesive freezing expansion. On the one hand, this expansion increases the compressive stress between the cement adhesive and metal accessories and porcelain parts. Under the condition, the accessories or ceramic parts are easily damaged, causing the insulator to lose its mechanical strength
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Embodiment 1
[0034] Embodiment 1: a kind of resistance low temperature cement adhesive, comprises the component of following percentage by weight:
[0040] The preparation method of the above-mentioned ultra-low temperature adhesive is as follows: firstly weigh each raw material; then pour Portland cement, silica fume, aluminate cement, dihydrate gypsum and quartz sand into the stirring pot in turn and stir slowly; Then add a good amount of water reducer and retarder to the mixing pot according to the proportion requirements, gradually add water, start the mixer to stir fully; the stirring time should not be less than 5min, and it must be stirred evenly before use.
[0041] Use the ultra-low temperature resistant adhesive prepared according to the above method to glue the porcelain insulator, and use it within ...
Embodiment 2
[0046] It is basically the same as Example 1, but the difference is the formula of the special low-temperature cement adhesive, which is as follows: Portland cement whose label is 52.5R: 30.63%
[0055] Substantially the same as Example 1, the difference is the formulation of Nai's special low-temperature cement adhesive, which is as follows: Portland cement whose label is 52.5: 26%
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Abstract
The invention discloses an ultralow-temperature resisting adhesive. The ultralow-temperature resisting adhesive is prepared from, by weight percentage, 26-36% of silicatecement, 1-3% of silicatecement, 1-3% of silica powder, 0-3% of aluminatecement, 0-3% of dehydrate gypsum, 49-56% of quartz sand, 7-15% of water, 0.1-1% of water reducer and 0-0.2% of retarder. Through reasonable cement formulas, the ultralow-temperature resisting adhesive can greatly improve the freezing resistance. Through the ultralow-temperature resisting adhesive, porcelain insulators can acquire good electrical insulating properties and good mechanical properties and accordingly can meet the application requirements at -55 DEG C.
Description
technical field [0001] The invention belongs to the field of electric power industry, and in particular relates to a special low temperature resistant adhesive. Background technique [0002] In extremely cold regions, porcelain insulators should have low temperature resistance in addition to good electrical insulation and mechanical properties. [0003] In terms of the damage degree of porcelain parts, metal accessories and cement cement under low temperature conditions, the cement cement bears the greatest pressure. Under low temperature conditions in severe cold regions, cement adhesives have to go through a freeze-thaw cycle every year, and the damage of freezing to cement adhesives is very serious. When water freezes, the volume increases by about 9%. After the water in the capillary of cement cement freezes into ice, the ice is bound in the capillary and generates huge compressive stress with the cement cement. This stress can make the internal structure of the cement...
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