Neutron radiation resisting barite low hydration heat concrete construction technology

Abstract

The invention relates to the technical field of building construction, in particular to a neutron radiation resisting barite low hydration heat concrete construction technology. According to the neutron radiation resisting barite low hydration heat concrete construction technology, raw materials of concrete are iron sand, glass dust, heavy crystal sand, iron ore, barite, cement, mineral powder, water and a water reducing agent; the construction technology comprises the following steps of A, calculating working mix proportion; B, feeding; C, stirring; D, transporting; E, pouring; F, maintaining. The technical scheme can effectively guarantee the construction quality of the concrete, good workability, no bleeding and good mobility in concrete pouring are guaranteed, and the requirements for radiation resistance, low shrink, high density, high uniformity and the like are satisfied. When a mass concrete structure with the minimum geometric dimensioning larger than 1.2m is subjected to construction by the adoption of the technical scheme provided by the neutron radiation resisting barite low hydration heat concrete construction technology, low hydration heat of the concrete construction can be guaranteed, the temperature difference between inside and outside is lower than or equal to 20 DEG C, the adiabatic temperature rise is lower than or equal to 55 DEG C, the phenomena of honeycombs, holes, slag inclusion and cracks do not occur on the surface of the concrete, and therefore higher pouring and vibrating quality can be guaranteed.

Description

technical field [0001] The invention relates to the technical field of building construction, in particular to a construction technology of neutron radiation-proof barite low-heat-of-hydration concrete. Background technique [0002] The apparent density and retained crystal water of concrete directly affect the ability of concrete to resist neutron radiation. Generally, the greater the apparent density and the more retained crystal water, the better the radiation resistance of concrete. For the anti-neutron radiation barite concrete with an apparent density of 3600kg / m3 and retained crystal water greater than 110kg / m3, it is necessary to control its heat of hydration and reduce concrete cracks while ensuring the strength and compactness of the concrete during construction generation. Because the heavy aggregate particles of this kind of concrete tend to sink to the bottom of the freshly mixed concrete during construction, and the water tends to move upward, which makes ...

AI Technical Summary

Problems solved by technology

Because the heavy aggregate particles of this kind of concrete tend to sink to the bottom of the freshly mixed concrete during construction, and the water tends to move upward, which makes the concrete prone to segregation and bleeding, and the sinking of the barite concrete aggregate makes the density distribution of the concrete uneven. Uniformity not only affects the strength of coagulation, but also affects the radiation resistance of concrete, which leads to its easy segregation during pouring, and it is difficult to guarantee fluidity, water retention and cohesion. Therefore, ordinary concrete in the prior art Construction technology cannot meet process requirements