Expansive material is an unfamiliar item for most people, but the use of expansive material is very extensive, such as in the production of materials, or in the field of silent explosion, the most common is concrete expansive material, in addition There are also refractory expanders and the like. So what are the points of attention when using it? Here is a brief introduction to everyone.
1. Scientifically and reasonably select the amount of expansive material, and the expansive material must be configured in the corresponding concrete mixing station. The purpose of the adaptation is mainly to determine the reasonable dosage and incorporation method according to the design expansion ratio index. The incorporation method usually has two methods of externally doping and internal doping to replace part of the mineral admixture.
2, control the temperature of the concrete pouring into the mold, generally in the range of 30 ± ° C is more reasonable.
3, to strengthen the vibrating of concrete, more dense than ordinary concrete vibrating.
4, scientific and reasonable maintenance methods, 7 days before pouring, strengthen maintenance, no less than 5 times a day between 10 am and 4 pm, and every 8th to 14th every morning and afternoon maintenance. It is not advisable to carry out watering maintenance at night, and it is not suitable for excessive maintenance in winter. It is very important to strictly carry out the maintenance of temperature monitoring, keeping in mind the principle of temperature control in the “heating stage cooling, cooling stage insulation”. ,
5, it is not advisable to use concrete with excessive mud content to produce concrete. It is not advisable to prematurely load concrete.
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Post time: Sep-27-2018