Mix proportion design method of cement stabilized regenerated gravel containing waste brick fine aggregate

A mix ratio design, cement stabilization technology, applied in solid waste management, sustainable waste treatment, climate sustainability, etc., can solve the problems of low strength and high water content

Active Publication Date: 2021-07-30
SHANDONG UNIV +1
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  • Abstract
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Problems solved by technology

[0006] In order to solve the problems of high water content and low strength of road materials containing recycled construction waste mixtures in the prior art, this invention proposes a design method for the mix ratio of cement-stabilized recycled gravel containing waste brick fine aggregates, which is extremely applicable , by selecting waste brick aggregates with appropriate particle size and evaluation parameters, the optimal moisture content of the cement-stabilized recycled gravel obtained by this design method is 11.5%, and the maximum 7d unconfined compressive strength is 5.60MPa

Method used

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  • Mix proportion design method of cement stabilized regenerated gravel containing waste brick fine aggregate
  • Mix proportion design method of cement stabilized regenerated gravel containing waste brick fine aggregate
  • Mix proportion design method of cement stabilized regenerated gravel containing waste brick fine aggregate

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Embodiment 1

[0050] A design method for the mix ratio of cement-stabilized recycled crushed stone containing waste brick fine aggregate is proposed to solve the problems of high waste brick content and difficult sorting in urban construction waste, and a heavy-duty compaction test of the mixture is carried out according to the synthetic gradation And 7d age unconfined compressive strength experiment, to verify the use of waste brick fine aggregate instead of waste concrete recycled aggregate in the field of cement stabilized base, especially the performance of cement stabilized recycled gravel containing waste brick fine aggregate.

[0051] In the following examples, the heavy compaction test of the mixture and the unconfined compressive strength test at 7d age were carried out according to the synthetic gradation to verify the performance of the mixture. In this test, composite Portland cement with the label number 42.5 was used, and the cement dosage was 5%. The test chose a mineral mater...

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Abstract

The invention relates to the field of application of waste concrete recycled aggregate to road water-stable layers, in particular to a mix proportion design method of cement-stabilized recycled macadam containing waste brick fine aggregate. The method comprises the following steps: screening the particle sizes of recycled concrete aggregate and waste brick fine aggregate; measuring indexes such as apparent relative density, sand equivalent and organic matter content of the recycled concrete aggregate and the waste brick fine aggregate; and replacing part of the recycled concrete fine aggregate with the waste brick fine aggregate, mixing according to a designed aggregate mixing ratio, and measuring technical indexes. The 7d unconfined compressive strength of the cement-stabilized regenerated crushed stone test part with the optimal replacement rate of the waste brick fine aggregate obtained by the mix proportion design method is 5.60 MPa, and the maximum dry density is 2.102 g/cm < 3 >.

Description

technical field [0001] The invention relates to the field of the application of waste concrete regenerated aggregates to road water stabilization layers, in particular to a mixing ratio design method for cement-stabilized regenerated gravel containing waste brick fine aggregates. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] The total output of commercial concrete is high, and a large amount of natural sand and cement are consumed. Every year, more than 3.5 billion tons of construction waste are generated due to the demolition and renovation of old buildings and the construction of new buildings, of which 70% are engineering dregs and waste concrete, which occupy an are...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B18/16C04B20/00C04B28/04
CPCC04B18/16C04B20/0076C04B28/04C04B2111/00991Y02W30/91
Inventor 王炳雷吕泊宁颜士荣孙宇褚凤明
Owner SHANDONG UNIV
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