Fast Calculation Method of Concrete Curing and Surface Humidity in Complex Environment

A technology for concrete surface and complex environment, which is applied in the field of rapid calculation of surface humidity and concrete maintenance of complex environmental structures. , The effect of strong real-time performance and simple method

Active Publication Date: 2019-03-19
WUHAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Based on the above situation, at present, there are no specific regulations and methods on how to achieve "moisture curing" and real-time control during the process of concrete curing, let alone calculation and detection methods for concrete surface humidity. Realize the goal of concrete moisturizing and curing

Method used

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  • Fast Calculation Method of Concrete Curing and Surface Humidity in Complex Environment
  • Fast Calculation Method of Concrete Curing and Surface Humidity in Complex Environment
  • Fast Calculation Method of Concrete Curing and Surface Humidity in Complex Environment

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Embodiment 1

[0039] Quick Calculation Method for Concrete Curing and Surface Humidity in Complicated Environments

[0040] Such as figure 2 As shown, the complex environment structural concrete maintenance method provided by the first embodiment includes the following steps:

[0041] Step 1. Real-time collection of ambient air temperature, humidity, and wind speed data; in the present embodiment, it is at the concrete curing site, and the construction maintenance personnel (or supervisors when inspecting and supervising) are to measure the ambient air temperature and humidity on the concrete curing surface with a thermo-hygrometer , and the wind speed is taken according to the weather forecast of the day. All measurements shall be kept in construction records.

[0042] Step 2. Real-time and rapid calculation method of surface humidity during the concrete curing period:

[0043] Substitute the data collected in real time in step 1 into formula 1 to calculate the concrete surface humidi...

Embodiment 2

[0050] Real-time control of moisturizing and maintenance quality of lining concrete in the unpressurized section of the flood discharge tunnel of Baihetan Hydropower Station

[0051] (1) Basic information

[0052] The Baihetan Hydropower Station is located in Ningnan County, Sichuan Province, and Qiaojia County, Yunnan Province, on the lower reaches of the Jinsha River. It is a control project for the development and management of the Yangtze River. The installed capacity of the power station is 14,004MW, and the annual average power generation is 60.241 billion kW·h. It is the second largest hydropower station in the world (after the Three Gorges). The hub project is composed of main buildings such as barrage, flood discharge and energy dissipation buildings and water diversion power generation system. The barrage is a concrete hyperbolic arch dam with a maximum height of 289.0m. The flood discharge facilities include 6 surface holes of the dam, 7 deep holes and 3 flood di...

Embodiment 3

[0064] Concrete moisturizing and spraying maintenance of the dam of Baihetan Hydropower Station

[0065] The basic situation of Baihetan Hydropower Station is the same as above. The barrage is a concrete double-curvature arch dam with a crest elevation of 834.00m, a maximum dam height of 289m, a crown beam top width of 14m, a bottom width of 63m, and a maximum arch end thickness of 85.45m. The arc length of the center line of the dam crest is 709m, and it is divided into 31 dam sections. At 24:00 on April 11, 2017, the first warehouse concrete was poured, which is the 18# dam section at the bottom of the dam, with a length of 63m and a width of 24m. Then, the jump warehouse is poured in blocks.

[0066] Dam C 90 30 Low-heat cement concrete is cured with tap water at normal temperature. The maintenance period is 28 days, and the outer surface is maintained until completion.

[0067] (2) Concrete real-time moisturizing and spraying maintenance

[0068] Before the end of J...

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Abstract

The invention provides a complex environment structure concrete curing and surface humidity rapid calculating method. The method can be used for effectively controlling the concrete curing quality andis characterized by comprising the following steps that 1, environment air temperature, humidity and wind speed data are collected in real time; 2, surface humidity during the concrete curing periodis rapidly calculated in real time, wherein the data which are collected in real time in the first step are put into a first formula, and the surface humidity of concrete is calculated out; and s(t)=(-0.1508+0.1468Sk+0.0001T-0.0001F)ln(t)+(0.9256+0.599Sk-0.0056T-0.01488F), t serves as the curing stopping time (h) after the concrete is subjected to moisturizing spraying curing, s(t) serves as the surface humidity of the concrete at t after curing is stopped, F serves as the environmental wind speed grade, T serves as the environment air temperature, and Sk serves as environment air humidity; 3,controlling the moisturizing spraying curing quality in real time, wherein under the condition that the s(t) which is calculated out in the second step is smaller than a required value, the sprayingcuring stopping time is shortened, and then spraying curing is conducted based on the shortened spraying curing stopping time; and 4, the above-mentioned steps from one to three are repeatedly conducted at regular intervals.

Description

technical field [0001] The invention belongs to the field of engineering structure concrete maintenance, and in particular relates to a complex environment structure concrete maintenance method and a corresponding fast calculation method for surface humidity. Background technique [0002] Concrete curing means that after concrete is poured, it gradually hardens due to cement hydration, and hydration requires appropriate temperature and humidity conditions, so in order to ensure that the concrete has suitable hardening conditions and its strength continues to grow. From the principle of humidity exchange, curing must ensure that there is sufficient humidity (moisture) inside the concrete, and there is basically no humidity exchange between the concrete on the curing surface and the air, that is, the curing must maintain the humidity of the concrete, hereinafter referred to as moisturizing curing. [0003] Concrete curing includes natural curing and steam curing. Specifically...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B28B11/24
Inventor 段亚辉段次祎温馨
Owner WUHAN UNIV
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