Full Length Article Compressive strength prediction of Portland cement concrete with age using a new model

The collected data was statistically analyzed based on existing experimental data of compressive strength values ​​of different concrete mixtures. This analysis reveals a model for predicting the compressive strength of concrete mixtures of all ages using two constants (A) and (B) which are considered properties of concrete mixtures. The constant (A) is introduced as the ratio of the intensity gain constant and (B) is introduced as the level of the intensity constant.

When the values ​​of the constants (A) and (B) are defined for the concrete mixture, it is possible to easily predict the compressive strength of any age without collecting data on the age. The values ​​of (A) and (B) can be determined by one of two methods. Solving two simultaneous equations at two different ages when performing design or test concrete mixing is one way of defining two constants. The other method is based on the strength of concrete at 28 days of age. The proposed model was studied for different concrete mixtures. This study covers a number of parameters including cement, metakaolin, mineral admixture as a partial substitute for nanosilica, the effect of solidification in water or lime, and the effect of curing temperature.

The analysis shows that the mixture-free mixture contains a mixture of silicon powder and room temperature cure, a mixture containing nanosilica and high precision tracking in water.

In this paper, the experimental results of the influence of sulfate on initial curing time and solidification time of ordinary Portland cement and compressive strength of concrete were introduced. It was observed that the sulphate type and ion concentration had a significant effect on the cure time; the increase in the initial cure time was more pronounced. These parameters reduce the compressive strength of concrete at different ages

The collected data was statistically analyzed based on existing experimental data of compressive strength values ​​of different concrete mixtures. This analysis reveals a model for predicting the compressive strength of concrete mixtures of all ages using two constants (A) and (B) which are considered properties of concrete mixtures. The constant (A) is introduced as the ratio of the intensity gain constant and (B) is introduced as the level of the intensity constant. When the values ​​of the constants (A) and (B) are defined for the concrete mixture, it is possible to easily predict the compressive strength of any age without collecting data on the age. The values ​​of (A) and (B) can be determined by one of two methods. Solving two simultaneous equations at two different ages when performing design or test concrete mixing is one way of defining two constants. The other method is based on concrete strength 28 days ago

Prediction of compressive strength of Portland cement concrete by new model

It is one of the most important properties of concrete and affects many other descriptive properties of hardened concrete. The average compressive strength required at a certain age (usually 28 days) determines the nominal water cement ratio of the mixture. Another factor that affects concrete strength at a certain age and solidifies at a specified temperature is the degree of compression. According to Abraham's law, the strength of fully compacted concrete is inversely proportional to the ratio of water to cement.