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Method for preparing high-density concrete with uniform aggregate and aggregate thereof

A high-density concrete and aggregate technology, which is applied in the processing of building materials, construction, building construction, etc., can solve the problems of large fluctuations in the uniform distribution rate of aggregates and difficulties in conveying high-density concrete, and achieve uniform radiation protection capabilities , Aggregate subsidence is reduced and the effect of improving efficiency

Active Publication Date: 2012-10-17
山东起凤建工股份有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In terms of quality assurance, sometimes a remedial method of spreading a layer of aggregate between pouring layers is used; in order to reduce sinking, a smaller slump and a shorter vibration time have to be used, which makes it difficult to convey high-density concrete and aggregate Large fluctuations in the uniform distribution rate

Method used

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  • Method for preparing high-density concrete with uniform aggregate and aggregate thereof
  • Method for preparing high-density concrete with uniform aggregate and aggregate thereof
  • Method for preparing high-density concrete with uniform aggregate and aggregate thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] When preparing concrete with a slump of 80mm according to the current specification, the cylindrical aggregate in the concrete with a slump of 80mm presents the attitude of the smallest horizontal plane, and the axis of the cylinder is parallel to the gravity line. The density of the prepared concrete is 4900kg / m 3 ;The density of iron columnar aggregate 1 is 7800kg / m 3 , the column height is 13mm, and the diameter of the horizontal section is D z =16mm, 15% of the surface of the prism is stuck with particles with diameters ranging from d=1.6 to 4.8mm, and the cross-section is S g =3.14×64mm 2 , the equivalent section of the aggregate is S d =7800 / 4900×3.14×8 2 mm 2 , the profile diameter of the secondary aggregate is d 2 =0.25×16mm, the diameter of the tertiary aggregate profile is d 3 =0.4×4mm, the rest are omitted.

[0042] Experimental estimation formula, average particle diameter, disturbed area S r =3.14K×(8+3.2+3.2) 2 mm 2 . In this embodiment, the nu...

Embodiment 2

[0049] When preparing concrete with a slump of 80mm according to the current specification, the cylindrical aggregate in the concrete with a slump of 80mm presents the attitude of the smallest horizontal plane, and the axis of the cylinder is parallel to the gravity line. The density of the prepared concrete is 4600kg / m 3 ;The density of iron columnar aggregate 1 is 7800kg / m 3 , the column height is 16mm, and the diameter of the horizontal section is D z =20mm, 5% of the surface of the prism is stuck with particles with diameters ranging from d=2 to 6mm, and the cross-section is S g =3.14×10 2 mm 2 , the equivalent section of the aggregate is S d =7800 / 4600×3.14×10 2 mm 2 , the profile diameter of the secondary aggregate is d 2 =0.4×20mm, the diameter of the tertiary aggregate profile is d 3 =0.2×8mm, the rest are omitted.

[0050] Experimental estimation formula, average particle diameter, disturbed area S r =3.14K×(10+4+4) 2 mm 2 . In this embodiment, the number...

Embodiment 3

[0057] When the concrete with a slump of 80mm is used according to the current specification, the cylindrical aggregate in the concrete with a slump of 80mm presents the attitude of the smallest horizontal plane, and the axis of the cylinder is parallel to the gravity line. The density of the prepared concrete is 6200kg / m 3 ;The density of lead columnar aggregate 1 is 11340kg / m 3 , the column height is 12.8mm, and the diameter of the horizontal section is D z =16mm, 20% of the surface of the prism is stuck with particles with diameters ranging from d=1.6mm to 4.8mm, and the cross section is S g =3.14×8 2 mm 2 , the equivalent section of the aggregate is S d =11340 / 6200×3.14×8 2 mm 2 , the profile diameter of the secondary aggregate is d 2 =0.25×16mm, the diameter of the tertiary aggregate profile is d 3 =0.3×4mm, the rest are omitted.

[0058] Experimental estimation formula, average particle diameter, disturbed area S r =3.14K×(8+3.2+3.2) 2 mm 2 . In this embodim...

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Abstract

The invention discloses a method for preparing high-density concrete with a uniform aggregate and an aggregate thereof, and particularly relates to a method for preparing high-density concrete, belonging to the technical field of concrete preparation. The method is characterized in that the disturbance area of a slurry caused by subsidence trend of an iron aggregate or a lead aggregate is larger than or equal to the equivalent area of the aggregate; a mixture hand sample is produced on an experiment table according to the calculated mix proportion before the mixture is tried; the subsidence condition of the iron aggregate or the lead aggregate is detected, and the detection data is recorded; and the concrete is poured in a split level when being poured in a layered mode. By adopting the method and the aggregate, the uniform distribution rate of the aggregates is improved, and the ray-preventing capability of projects is more uniform.

Description

technical field [0001] The invention relates to a method for preparing high-density concrete with uniform aggregate and aggregate thereof, belonging to the technical field of concrete preparation, and in particular to a method for preparing high-density concrete and aggregate thereof. Background technique [0002] Concrete manufacturing technology is a traditional technical field. For various indicators including the uniform distribution of aggregate (hereinafter referred to as the uniform distribution rate), the workability requirements of concrete, etc., the mix ratio design and trial mix are completed according to the current specifications, because the coarse aggregate and fine aggregate of ordinary concrete There is not much difference in density from cement slurry. In a certain slump range, the aggregate sinking is not obvious, so no special attention can be paid. [0003] The ability of high-density concrete with the same thickness to attenuate rays is approximately ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04G21/02C04B14/34
Inventor 张会亭田绪峰巩曰新田昭春张志新孙茂波周锫黄琪亮巩天涛巩方涛田昊穆冠帅田连超
Owner 山东起凤建工股份有限公司
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