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Preparation method and product of cemented sand and gravel with slurry and vibration

A technology of cemented sand and gravel and sand and gravel, applied in the field of improving the existing dam construction method, can solve the problems of high cost, slow construction progress, poor environmental protection performance, etc., and achieve the effects of low cost, improved construction efficiency, and reduced cost

Inactive Publication Date: 2016-04-13
CHINA INST OF WATER RESOURCES & HYDROPOWER RES +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the protective layers of cemented sand gravel dams and roller compacted concrete dams are mainly composed of normal concrete, concrete panels, and abnormal RCC; however, the use of the above materials as protective layers has high cost, poor environmental performance, and slow construction progress. shortcoming

Method used

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  • Preparation method and product of cemented sand and gravel with slurry and vibration
  • Preparation method and product of cemented sand and gravel with slurry and vibration
  • Preparation method and product of cemented sand and gravel with slurry and vibration

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Embodiment Construction

[0061] For ease of understanding, when we use natural sand and gravel from the source of material as the material to prepare a dam engineering protective layer with a design requirement of an impermeability level of W8 and a frost resistance level of F200, we will give an example of the implementation of the present invention. For example, the technical solution of the present invention will be explained in detail.

[0062] Among them, the natural sand and gravel in this embodiment, the sand ratio of the coarsest gradation, the finest gradation and the average gradation of the sand and gravel materials are 10.3%, 28% and 18%, respectively.

[0063] Remove particles with a particle size of 150mm or more, and draw the envelope curve of the natural sand and gravel gradation curve based on the finest, average and coarsest gradations of the natural sand and gravel samples collected (22 in this example) (See figure 1 ), the finest gradation 1, the average gradation 2, and the coarsest gr...

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Abstract

The invention relates to a preparation method for pulp-added and vibrated gelatinized sand gravels and a product. The method comprises the following steps: a, collecting natural sand gravels on the construction site, culling particles with the particle size of over 150 mm, and using the sand gravels with a grade change as sand gravel materials for preparing a parent material; b, mixing water, cement, coal ash and the sand gravel materials according to a certain ratio so as to prepare gelatinized sand gravels serving as a parent material; c, adding pulp to prepare the pulp-added and vibrated gelatinized sand gravels by the prepared parent materials according to a certain pulp adding rate, wherein a method for determining the pulp adding rate comprises the following steps: preparing the pulp-added and vibrated gelatinized sand gravels by using the gelatinized sand gravels of the sand gravel materials with the thinnest grade and the average grade as the parent materials, and selectively determining the proper pulp adding rate by detecting the performance of a test sample. The method disclosed by the invention is simple, and the construction of a dam body is not interfered; furthermore, the prepared pulp-added and vibrated gelatinized sand gravels have the characteristics of higher mechanical strength, high anti-seepage property, high anti-freezing durability and low cost.

Description

Technical field [0001] The invention relates to a method for preparing grout vibrating gelled sand and gravel and a product prepared by the method. It belongs to the field of construction and is mainly used to improve existing dam construction methods, especially under the premise of obtaining expected performance. Achieve the effect of significantly reducing construction costs. Background technique [0002] Cemented sand and gravel dam construction technology is a new type of dam construction technology developed internationally. It is characterized by the use of cementitious materials and the sand and gravel materials (such as sand, stone, gravel, etc.) on the project site to mix and build the dam, and then use high efficiency Of earth and stone transportation machinery and compaction machinery. Compared with conventional concrete dam construction technology, the technical characteristics of cemented sand and gravel dam construction are: only super-large aggregates in the on-s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/00C04B18/08C04B14/02
CPCY02W30/91
Inventor 贾金生马锋玲冯炜郑璀莹杜振坤吕小彬杨会臣徐耀翟洁
Owner CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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