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Method for obviously reducing aggregate unevenness of cement stabilized macadam unconfined compressive strength mixture prepared by vibration stirring method

A technology of cement stabilizing gravel and vibrating mixing, which is applied to cement mixing devices, clay preparation devices, chemical instruments and methods, etc., can solve the problems of waste of resources, increased discreteness, and increased cement design dosage, and achieves ingenious design, The operation is simple and convenient, and the effect of uneven aggregate is weakened

Inactive Publication Date: 2019-04-16
中国建筑土木建设有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Manual charging is used for separate molding. Due to the randomness of manual charging, it will inevitably cause uneven aggregate content and uneven gradation distribution in the test piece to be formed. This unevenness will inevitably lead to 7 The dispersion (standard deviation / mean value) of the unconfined compressive strength of the day increases, which leads to an increase in the design amount of cement, resulting in waste of resources

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] In the "Test Regulations for Highway Inorganic Binder Stable Materials", it is stipulated that the number of formed test pieces without lateral compressive strength is 9. In order to facilitate the equalization of the cement-stabilized gravel mixture prepared by the vibration stirring method, the number of It is set to 8, that is, each 1 / 8 equal portion of the cement-stabilized gravel mixture (that is, the mixture without lateral compressive strength) is independently formed as a test piece. The diameter and height of the unconfined compressive strength test piece are both 15cm, and the total weight of the unconfined compressive strength test piece after forming is about 6.5kg. Considering factors such as the cement-stabilized gravel mixture sticking to the pot and the loss during the mixing process, the molding weight of a single unconfined compressive strength specimen was taken as 7kg, and the mixing volume in a single pot was 56kg.

[0038]Each sample without latera...

Embodiment 2

[0041] Basically the same as Example 1, the difference is that each part of material without lateral compressive strength includes 6.49kg of graded gravel, 0.21kg of PO 42.5 cement, and 0.3kg of water, a total of 7kg, that is, the cement content ωc is 3.0% Weight; the stockpiles are in the shape of a round table.

Embodiment 3

[0043] Basically the same as in Example 1, the difference is that each test piece without lateral compressive strength includes 6.455kg of graded gravel, 0.245kg of PO 42.5 cement, and 0.3kg of water, a total of 7kg, that is, the cement content ωc is 3.5% weight.

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Abstract

The invention discloses a method for obviously reducing aggregate unevenness of a cement stabilized macadam unconfined compressive strength mixture prepared by a vibration stirring method. The methodcomprises the steps that (1) the cement stabilized macadam mixture prepared by the vibration stirring method is spread on a flat ground, mixed uniformly and stacked into a stack, the stack is in a circular truncated cone shape or a conical shape, and the cement stabilized macadam mixture contains n parts of non-lateral compressive strength specimens, wherein the n is an integer greater than 1; (2)the stack is equally divided into n parts of non-lateral compressive strength specimen mixtures; and (3) each of the non-lateral compressive strength specimen mixture is loaded into an unconfined compressive strength test mold for curing molding. According to the method for obviously reducing the aggregate unevenness of the cement stabilized macadam unconfined compressive strength mixture prepared by the vibration stirring method, the aggregate unevenness of the cement stabilized macadam unconfined compressive strength mixture prepared by the vibration stirring method can be weakened obviously, the design is ingenious, the operation is simple and convenient, and the method is suitable for the large-scale popularization and application.

Description

technical field [0001] The invention relates to the technical field of building construction, in particular to the technical field of preparing cement-stabilized macadam with unconfined compressive strength by a vibration-stirring method. A method in which the aggregate of the mixture is uneven. Background technique [0002] Inhomogeneity of aggregate includes uneven aggregate content and uneven aggregate gradation distribution. With the popularization of the cement-stabilized crushed stone vibrating mixing method in construction technology in recent years, the corresponding mixture preparation method in the laboratory has also changed from the traditional artificial stuffing method to the vibrating mixing method. And corresponding landmarks have been formed in Henan and Hebei, and corresponding landmarks in other regions are also taking shape. [0003] Different from the artificial stuffing method, where the materials of each test piece are weighed separately, mixed separ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B28C5/00B28B17/02C04B28/00G01N1/28
CPCB28B17/02B28C5/003C04B28/00G01N1/28C04B14/02
Inventor 桂强刘广华马明磊
Owner 中国建筑土木建设有限公司