Combined UHPC curing method

A combined, beam-based technology, applied in the direction of ceramic molding machines, manufacturing tools, auxiliary molding equipment, etc.

Active Publication Date: 2021-09-10
GUANGDONG PROVINCIAL CHANGDA HIGHWAY ENG
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Considering that there is currently no mature maintenance technology for prefabricated box girders with large volume and complex structures in China to meet the maintenance needs of UHPC

Method used

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Embodiment Construction

[0035] The technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0036] see Figure 1-5 Shown, a kind of combined type UHPC conservation method, the step of this conservation method comprises:

[0037] Step 1: After the concrete is poured on the beam-making pedestal, it is placed at rest for equal strength. The set time of standing for equal strength is related to the current air humidity data and air temperature data, and the air humidity data and air temperature under the current air environment are measured. The data is compared according to the provided setting time comparison table, ...

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Abstract

The invention discloses a combined UHPC curing method. The curing method comprises three curing procedures, namely preliminary curing with a mold, demolding spraying curing and high-temperature steam curing, in addition, a temperature control system aiming at the three curing procedures is arranged in the curing method, temperature and humidity curing is carried out through the three curing procedures, and therefore the temperature difference between inside and outside the structure is reduced, and meanwhile the hydration effect is promoted; during long-line method prefabrication, prefabrication is carried out from the segments on the two sides of a pedestal to the middle, operation points continuously change, and fixed curing facilities cannot be adopted; and in addition, the field of the beam prefabricating pedestal is limited, the steam curing facilities are not easy to arrange, reasonable steam curing mode and facilities need to be adopted, the number of UHPC segment prefabricated box beam curing facilities is large, accurate control is required, operation can be conducted not only by manual work, an efficient control system is adopted, the curing quality is improved, and the labor cost is lowered.

Description

technical field [0001] The invention relates to the field of ultra-high performance concrete (hereinafter referred to as UHPC) maintenance, in particular to a combined UHPC maintenance method. Background technique [0002] UHPC is mainly composed of cement, silica fume, fly ash, water reducer, quartz sand, steel fiber and other materials; it is constructed according to the principle of maximum compactness, and the pores between material particles are filled with materials with smaller particle sizes, so that The pores and micro-cracks inside the material are minimized; it has ultra-high strength and excellent durability due to its high density. The dispersed steel fibers in UHPC can greatly slow down the expansion of micro-cracks inside the material, so that UHPC has ultra-high toughness. Coarse aggregates are not added to UHPC, and the cement used is of high strength grade and large amount, and the heat of hydration and shrinkage are also large; especially for large-volume...

Claims

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Application Information

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IPC IPC(8): B28B11/24
CPCB28B11/245B28B11/247B28B17/0063B28B17/0081
Inventor 刘志峰陈松涛吴夏宗冯翔
Owner GUANGDONG PROVINCIAL CHANGDA HIGHWAY ENG
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