Sentence examples for mix proportioning methods from inspiring English sources

Mix proportioning methods of normal concrete cannot adequately account for the large variations in the properties of ingredients.

This study aims to assess the effect of different mix proportioning methods (the conventional ACI method versus the modified EMV method) on the drying shrinkage and freeze-and-thaw resistance of concrete.

The concrete mixes designed using the modified Brouwers mix design algorithm and particle packing concept had a potential to reduce up to 20% binder content compared to existing SCC mix proportioning methods and still maintain good performance.

Figure 8 illustrates the effect of the mix proportioning method on the drying shrinkage result of mix series 2 following 105 days.

All the results of 2E-A1, 2E-andand 2E-A3 confirm that the drying shrinkage problem of the RCA concrete can be overcome using the modified EMV mix design, contrary to the conventional mix proportioning method.

Open image in new window Fig. 8 Effect of mix proportioning method on the drying shrinkage for mix series 2. The relative dynamic moduli were calculated using Eq. (14).

Drying shrinkage and freeze-and-thaw resistance of RCA concrete have been tested to evaluate the effect of the mix proportioning method, i.e., the modified EMV method and the conventional ACI method.

Meanwhile if one compares the effect of the mix proportioning method between the conventional mix (2C-A) and the modified EMV mix (2E-A2, S = 2) with the same RCA substitution, it will be clearly seen in Fig. 10 that the relative dynamic modulus of the modified EMV mix exhibits a 5.1% stronger resistance than that of the conventional mix.

To evaluate the effect of the mix proportioning method on drying shrinkage and freeze-and-thaw resistance of recycled concrete aggregate (RCA) concrete, two series of concrete mixes were made using the modified equivalent mortar volume (EMV) method and the conventional ACI method.

Therefore, the modified EMV mix proportioning method has been proposed (Yang and Lee 2017a, b; Kim et al. 2016), assuming that a certain volume fraction of the residual mortar may be mathematically treated as original virgin aggregate, while the other fraction as a part of the total mortar.

Figure 10 illustrates the effect of the mix proportioning method on the freeze-and-thaw resistance for mix series 2. Compared to mix series 1, it appears that all the test data in mix series 2 showed a gradual decrease tendency with the freeze-and-thaw cycles but satisfied the KS requirement of 80%, although the 2C-A mix and the 2E-A3 mix appeared to diverge more.