Concrete strength prediction method and system based on weight maturity
A concrete strength and prediction method technology, applied in the field of concrete, can solve the problems of large measurement deviation, inability to effectively evaluate the safety quality and durability of concrete structures, overestimate the hardening process of concrete, etc., and achieve the effect of improving prediction accuracy
Active Publication Date: 2020-09-22
SHENZHEN UNIV
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Problems solved by technology
[0005] The technical problem to be solved by the present invention is to provide a concrete strength prediction method and system based on weight maturity in view of the above-mentioned defects of the prior art, aiming at solving the problem that the existing concrete strength prediction method ignores the contribution of humidity to strength development, The hardening process of concrete is overestimated, the measurement deviation is large, and the safety quality and durability of concrete structures cannot be effectively evaluated
Method used
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Embodiment 1
[0086] (1) Concrete sample prefabrication: select a certain brand of P.Ⅱ.42.5R water general portland cement composition, according to the "General Portland Cement" GB175-2007, its composition is shown in Table 1. The above-mentioned Portland cement is formulated into concrete according to the proportion of concrete materials in Table 2, and the concrete is molded to obtain a concrete sample;
[0087] The chemical analysis (%) of table 1 ordinary portland cement
[0088] SiO 2
Al 2 o 3
Fe 2 o 3
CaO MgO SO 3
K 2 o
OPC 18.59 4.62 4.17 64.67 64.67 3.32 0.92
[0089] Table 2 Mixing ratio of 1 cubic meter of concrete materials
[0090]
[0091] (2) Concrete sample curing: After the concrete sample is put into the standard curing room for pre-curing for 4 hours, the concrete sample is put into the constant temperature and humidity curing box according to the preset curing mode for 24 hours, and then the formwork is ...
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The invention discloses a concrete strength prediction method and system based on weight maturity. The method comprises the following steps: acquiring an internal temperature value and an environmental humidity value of concrete; inputting the concrete internal temperature value and the environment humidity value into a pre-established extended weight maturity prediction strength model to obtain an extended weight maturity value; and obtaining a concrete strength prediction value according to the extended weight maturity value and a pre-established extended weight maturity value-concrete strength value curve graph. According to the method, the concrete strength is predicted based on the extended weight maturity prediction strength model of the coupling environment humidity, the internal humidity change of the concrete does not need to be considered during strength prediction, and the prediction precision of the concrete strength in the variable-temperature and variable-humidity environment is improved.
Description
technical field [0001] The invention relates to the technical field of concrete, in particular to a concrete strength prediction method and system based on weight maturity. Background technique [0002] The curing environment is an important factor affecting the development of concrete strength. Among them, water is a sufficient condition for the hydration reaction of concrete, and the continuous development of concrete strength also needs to maintain a stable water content. For example, during the curing process after concrete pouring, if the water is not replenished in time due to the evaporation of water, the concrete hydration reaction will be insufficient, which will affect the development of strength and durability problems such as cracks caused by concrete shrinkage. The commonly used methods for predicting concrete strength non-destructively using maturity include: Shore maturity concept, equivalent hydration age based on Arrhenius formula, Dutch weight maturity meth...
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Login to View More IPC IPC(8): G06F30/20G06F119/08G06F119/14
CPCG06F30/20G06F2119/08G06F2119/14
Inventor 王险峰许圣业朱继华韩宁旭邢锋
Owner SHENZHEN UNIV