A rapid method for predicting actual strength of single-mixed fly ash lightweight aggregate concrete
A lightweight aggregate concrete and fly ash technology, applied in the field of concrete, can solve the problems that there are not many studies on lightweight aggregate concrete, the amount of fly ash is not considered, and the effect of water-cement ratio on cement strength, etc.
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Embodiment 1
[0031] Combine below Figure 1 to Figure 3 , which describes in detail the method for rapidly predicting the actual strength of single-mixed fly ash lightweight aggregate concrete of the present invention.
[0032] Please refer to Figure 1 to Figure 3 , a method for rapidly predicting the actual strength of single-mixed fly ash lightweight aggregate concrete, including:
[0033] Step S1 Prepare a number of lightweight aggregate concrete test blocks mixed with fly ash with different dosages according to the "Test Methods for Mechanical Properties of Ordinary Concrete" GB50081-2002. Carry out curing at different curing temperatures, and test the compressive strength at different ages;
[0034]In step S2, a temperature sensor is arranged in the single-mixed fly ash lightweight aggregate concrete test block, and the collected temperature data is uploaded to the processor. The maturity value of fly ash lightweight aggregate concrete of each age is calculated according to the da...
Embodiment 2
[0061] Please continue to refer Figure 1 to Figure 3 , according to the formula provided in Example 1, according to the "Lightweight Aggregate Concrete Technical Regulations" (JGJ 51-2002), the design strength is LC50 lightweight aggregate concrete benchmark mix ratio and cement replacement rate of 0~50% fly ash light Aggregate concrete mix such as figure 1 shown. In accordance with the relevant requirements of "Standards for Test Methods of Mechanical Properties of Ordinary Concrete" (GB / T50081-2002), standard three-dimensional specimens of 150 mm × 150 mm × 150 mm were prepared for compressive strength tests after curing for 7 days and 28 days. Among them, the 28d compressive strength in the factory index of cement is 42.9MPa.
[0062] Substituting the age of required predicted strength and curing temperature into formula (1) to obtain the maturity of fly ash lightweight aggregate concrete at different ages, and then figure 1The water-binder ratio, fly ash content, and 2...
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