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Water cooling temperature control method of mass concrete of blast furnace foundation

A technology of mass concrete and temperature control method, which is applied in the direction of construction, building structure, and building material processing, etc., and can solve the problem of damage to the bearing capacity, use function and durability of engineering structures, accelerated natural aging of concrete, moisture and harmful substances Infiltration and other problems can be achieved to shorten the time of heat dissipation, ensure the quality of concrete, and reduce the effect of curing time

Inactive Publication Date: 2010-12-15
TIANJIN 20 CONSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The occurrence and development of concrete cracks not only affect the appearance of the project, but also accelerate the carbonation of concrete, affect the frost resistance and impermeability of the structure, cause the infiltration of moisture and harmful substances, induce corrosion of steel bars or accelerate the natural aging of concrete, thus damaging the engineering structure The bearing capacity, function and durability of the structure may even become a precursor to structural damage, directly affecting the performance of engineering benefits.

Method used

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  • Water cooling temperature control method of mass concrete of blast furnace foundation
  • Water cooling temperature control method of mass concrete of blast furnace foundation
  • Water cooling temperature control method of mass concrete of blast furnace foundation

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Experimental program
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Effect test

Embodiment 1

[0028] Embodiment 1: as figure 1 , 2 As shown, after the steel bars on the bottom plate of the blast furnace foundation are bound, the cooling water pipe 1 is constructed on the steel bar fixing frame 3. Within the scope of 53m×38.6m in the foundation, three layers of serpentine water pipes with a diameter of 48mm@1500mm are embedded in advance. The first The distance between the first layer and the concrete cushion is 1m, the distance between the second layer and the concrete cushion is 2.5m, and the distance between the third layer and the concrete cushion is 4m. Before pouring, it is necessary to conduct a water leak test and repair the water seepage point; (2) When the concrete is poured to the level of the cooling water pipe, the water will be passed immediately; The cooling water pipe starts to circulate; when the bottom of the second layer of cooling water pipe is poured with concrete, the water pump is turned on immediately, and the second layer of cooling water pipe ...

Embodiment 2

[0029] Embodiment 2: as Figure 4a As shown in, b, the hot rolling project of Nanshan Aluminum Alloy Processing Plant, the equipment foundation of the rough rolling mill area mainly includes the foundation of the rough rolling mill and vertical rolling mill. The whole foundation is located between the 8-12 / B-F line, and the foundation is excavated to -9.1m, 10.1m, the elevation of the top surface fluctuates more around ±0.000. The foundation is 36.625m long and 48.385m wide. Along the direction of Line 10, there is a 2.0m long post-cast belt running through the foundation, with a concrete volume of about 8600m 3 , The concrete strength grade is C30.S6. The dual control measures of external heat preservation and internal cooling are implemented for the foundation. For this reason, pre-buried in the foundation 6 (7) layers of serpentine water pipes @1500mm are horizontally arranged 500mm inside the foundation side, and the height direction is 1500mm inside the foundation sid...

Embodiment 3

[0030] Embodiment 3: as Figure 5a The foundation of the finishing mill of Nanshan Light Alloy Hot Rolling Project shown in b and b is located between the 30-34 / B-F line with a length of 50.0m and a width of 60.0m. The foundation is dug to -7.1m, -9.1m, -10.1m, -12.1m, and the elevation of the top surface fluctuates a lot. There is a 1.0m wide post-casting belt running through the foundation along the D-axis direction. The amount of concrete is about 7800m 3 , The concrete strength grade is C30.S6. The dual control measures of external heat preservation and internal cooling are implemented for the foundation. For this reason, pre-buried in the foundation 6 layers of @1500mm snake-shaped water pipes are arranged 500mm inside the foundation side, and each layer is a network frame composed of steel pipes with a vertical and horizontal spacing of 2000mm, and the layer height is 1500mm. To achieve the purpose of making the entire base temperature drop evenly. Each layer of co...

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Abstract

The invention relates to a water cooling temperature control method of the mass concrete of a blast furnace foundation. The method comprises the following steps: (1) embedding circulating water cooling steel pipes on a concrete foundation steel reinforcement holder; connecting the cooling water steel pipes; performing a water-filling pressure test to check whether the leakage point exists; (2) beginning concreting while opening a water pump to circulate the cooling water; (3) monitoring water temperature: adjusting the difference value of the temperature of the water inlet and the temperature of the water outlet to 20-25 DEG C; and (4) controlling the difference value of the maximum temperature in concrete and the temperature on the surface of concrete to 20-25 DEG C. By embedding the cooling water pipes, the temperature difference in and out of concrete can be reduced, the structural crack of concrete can be avoided; and the time for losing heat in concrete is shortened, the maintenance time of the concrete structure is reduced, and the concrete quality is ensured. The work efficiency can be increased by at least four times, the cost is greatly reduced, the work efficiency is increased, and conditions are created for the advance construction of the next procedure.

Description

technical field [0001] The invention relates to a large-volume concrete construction method on the blast furnace foundation top, in particular to a control method for controlling the water cooling temperature inside the concrete. Background technique [0002] In the construction of basic engineering of metallurgical industrial equipment, especially blast furnace engineering, as the scale of blast furnace increases, the amount of foundation concrete increases accordingly. During the continuous pouring and hardening of mass concrete, the hydration reaction of cement generates a large amount of hydration heat. Concrete has a large cross-sectional size and high thermal resistance. The internal heat of hydration is not easy to dissipate. The hydration temperature rises rapidly, and the surface dissipates heat quickly, forming a large temperature difference between the interior and the surface of the concrete. Changes in the temperature difference between the interior and surface ...

Claims

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Application Information

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IPC IPC(8): E04G21/02
Inventor 肖策张永杰纪建成高有为
Owner TIANJIN 20 CONSTR
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