UHPC (Ultra High Performance Concrete) material for reinforcing existing whole rubble wall and reinforcing method thereof

A technology for rubble and walls, which is applied in the field of strengthening UHPC materials for existing whole rubble walls and its reinforcement field. It can solve the problems of low strength, severe weathering, and insufficient fullness of mortar, etc., and achieve improved earthquake resistance and good fullness. , Increase the effect of mobility and adaptability

Active Publication Date: 2022-03-11
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The stone wall is made of red clay mortar with low strength and serious weathering; figure 2 shown)

Method used

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  • UHPC (Ultra High Performance Concrete) material for reinforcing existing whole rubble wall and reinforcing method thereof
  • UHPC (Ultra High Performance Concrete) material for reinforcing existing whole rubble wall and reinforcing method thereof
  • UHPC (Ultra High Performance Concrete) material for reinforcing existing whole rubble wall and reinforcing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] This example provides a reinforcement method for existing solid stone walls, including the following steps:

[0045] Step (1): Carry out pretreatment on the existing solid stone wall to be reinforced, including: determine the position of the main gasket, protect the main gasket, and use a chisel) to remove some auxiliary stone gaskets (keep the auxiliary stone gaskets that are difficult to remove ), take out part of the laterite mortar in the ash joint; clean up the dust in the ash joint, and apply a layer of cement slurry on the surface of the wall to be reinforced to enhance the interface bonding performance between the wall and the reinforced surface;

[0046] Step (2): Use the steel bar binding method to tighten and reinforce the existing solid stone wall pretreated in step (1) in a horizontal and vertical manner; the specific process is: horizontally and vertically Tighten and reinforce. Use steel bars (15mm in diameter) to pass through the mortar joints of the wa...

Embodiment 2

[0053] This example provides a method for strengthening the existing solid stone wall. The difference from Example 1 is that the UHPC material used for strengthening the existing solid stone wall includes: Portland cement 550kg / m 3 , white silica fume 200kg / m 3 , limestone powder 530kg / m 3 , Quartz sand 735kg / m 3 , iron ore tailings particles 75kg / m 3 , pumice particles 60kg / m 3 , polycarboxylate water reducing agent 30kg / m 3 , water 255kg / m 3 and POM fiber 25kg / m 3 ; The rest of the steps and parameters are the same.

Embodiment 3

[0055] This example provides a method for strengthening the existing solid stone wall. The difference from Example 1 is that the UHPC material used for strengthening the existing solid stone wall includes: Portland cement 600kg / m 3 , white silica fume 180kg / m 3 , limestone powder 510kg / m 3 , Quartz sand 715kg / m 3 , iron ore tailings particles 60kg / m 3 , pumice particles 50kg / m 3 , polycarboxylate water reducer 15kg / m 3 , water 230kg / m 3 and POM fiber 35kg / m 3 ; The rest of the steps and parameters are the same.

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Abstract

The invention discloses an existing whole rubble wall reinforcing UHPC material and a reinforcing method thereof, and belongs to the technical field of wall reinforcing, the existing whole rubble wall reinforcing UHPC material comprises 550-600 kg / m < 3 > of Portland cement, 180-200 kg / m < 3 > of white silica fume, 510-530 kg / m < 3 > of limestone powder, 715-735 kg / m < 3 > of quartz sand, 60-75 kg / m < 3 > of iron ore tailing particles, 50-60 kg / m < 3 > of pumice particles, 15-30 kg / m < 3 > of a polycarboxylic acid water reducer, 230-255 kg / m < 3 > of water and 25-35 kg / m < 3 > of POM fibers; the improved novel UHPC section increasing method and the steel bar binding method are combined to reinforce the existing whole rubble wall body, the thickness of the whole rubble wall body can be increased, and the stability of the whole rubble wall body is improved; and the anti-seismic property and durability are remarkably improved, and the method is convenient to construct and can be widely applied to anti-seismic reinforcement of the whole rubble wall.

Description

technical field [0001] The invention relates to the technical field of wall reinforcement, in particular to a UHPC material and a reinforcement method for existing solid stone wall reinforcement. Background technique [0002] The solid stone wall has the advantages of good durability, easy to obtain materials, and low price, and is widely used in the southern Fujian area along the coast of Fujian Province. The stone masonry dwellings in southern Fujian adopt a horizontal wall load-bearing system, and the walls are solid stone walls. The so-called whole stone refers to a long stone that has been roughly processed by hand with professional tools, with a cross-sectional width and height of about 210mm. Part of the wall is thin and built only with single skin stone, and the wall thickness is about 210mm (such as figure 1 shown), does not meet the requirements of 240mm in the "Technical Regulations for Reinforcement of Stone Masonry Structures in Fujian Province". At the same ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04E04G23/02C04B14/06C04B14/16C04B14/28C04B14/30C04B18/12
CPCC04B28/04E04G23/0218C04B14/306C04B14/28C04B14/06C04B18/12C04B14/16C04B2201/50C04B2111/00155C04B2103/302C04B16/0675Y02W30/91E04G23/0211
Inventor 吴应雄朱远浩黄伟
Owner FUZHOU UNIV
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