Through deriving mathematical formula the expression of water—binder ratio of concrete mix is obtained. 因此,如何在浇筑现场快速测定新拌混凝土拌合物的水胶比就显得尤为重要。 更多例句>> 4) mixing proportion of ready-mixed concrete 预拌混凝土配合比5...
the dried test sample, adding hydrochloric acid into the sample, filtering the mixture after stirring, calcining the residue, weighing the powder mass after calcination, obtaining the mass of undissolved substances in the powder by calculation; and calculating the mixing ratio according to formula. ...
4 change of formula of mixing strength The formula for calculating the mixing strength of the original standard concrete: R = R, /-t = Cv The formula for calculating the mixing strength of new standard concrete: FCU, o=fcu, k+t Sigma Type: FCU, O - mixing strength of concrete MPa; ...
These parameters were calculated based on the model formula by [34]. The uniaxial compressive and tensile responses of concrete, according to the Concrete Damage Plasticity Model, were determined under compression and tension loads as follows: $${\sigma }_{t}=\left(1-{d}_{t}\right){E}_{...
The 4:1 strength concrete mixing formula applies the measuring portions in volume sense (e.g. 4 buckets of concrete aggregate, which consists of gravel and sand, with 1 bucket of cement.) In order not to end up with a too wet concrete, add water gradually as the mixing progr...
for storage of graded aggregate, (ii) a dryer for drying and heating aggregates to the required mixing temperature, (iii) tanks for storing the liquid asphalt, and (iv) a pug mill for combining the graded, heated aggregate and liquefied asphalt cement according to the specified mix formula....
mm. After the impact, remove the aggregate from the measure and sieve it through a 2.36 mm sieve. The aggregate impact value for the test samples is calculated using the formula: $${\text{Aggregate Impact Value}}\, = \,\left( {{\text{Weight of Material Passing through 2}}.{\text{...
6 and the least squares method to define the parameters to be determined in the concrete resistivity formula, the parameters can be obtained, as shown in Table 2. Table 2 Parameters of the concrete resistivity model. Full size table To verify the prediction capability of the proposed resistivity...
In the formula: \(Y\) represents the result of normalization; \(X_{\min }\) is the minimum value in the sample; \(X_{\max }\) is the maximum value in the sample; \(X\) is the sample value that needs to be normalized. Parameter settings For the MLP model in the IABC-MLP mo...
Formula (3) of linear relation was obtained through fitting the dynamic compressive strength with the average strain rate, Based on Fig.10and Formula (3), the average strain rate was 50–130 s−1. For the four kinds of concrete, the dynamic compressive strength increased with the average ...