KING HP-S10 is a high performance concrete capable of reaching high early and later age compressive strengths while maintaining excellent durability. The product can be used in many applications including infill strips for precast bridge replacement, rapid bridge replacement, bridge deck patch repair, expansion joint replacement and other concrete repair or new construction applications requiring high performance concrete. While HP-S10 is capable of reaching high early age strengths (i.e. at 12 and 24 hours) it is still sensitive to temperature, since the product uses conventional Portland cement-based technology. As with any Portland cement-based concrete the lower the temperature of the constituents (i.e. cement, aggregate, water) and the curing temperature, the longer the concrete will take to set, generate heat and begin developing compressive strength. Therefore, a study was undertaken to determine the early age compressive strength of HP-S10 at varying plastic concrete temperatures and concrete cylinder curing temperatures.
The test protocol involved batching HP-S10 at plastic temperatures of 5°C,13°C and 21°C and then placing the concrete cylinder specimens in a temperature controlled curing apparatus immediately after casting at a curing temperature of either 5°C, 13°C or 21°C. The concrete cylinder specimens were tested for compressive strength at 12 hours, 24 hours and 28 days and the results can be seen for the 5°C, 13°C and 21°C curing temperatures in Figure 1, Figure 2 and Figure 3, respectively. It should be noted that regardless of the plastic temperature,the concrete cylinder specimens cured at 5°C did not have sufficient compressive strength to record after 12 hours of curing so the cylinders were tested at 24 hours, 7 days and 28 days of age. It can be seen from the data that the most important variable affecting the 12 hour and 24 hour compressive strength was the concrete cylinder curing temperature, as the compressive strength increased with increasing concrete cylinder curing temperature. It can also be seen that the compressive strength at 24 hours also increased with increasing plastic concrete temperature but to a lesser extent. The plastic concrete temperature and curing temperature had very little influence on the 28 day compressive strength as the values were generally unaffected.
After performing this study, it is apparent that if curing temperatures are expected to fall below 21°C and high early strengths are required for HP-S10 (as per the technical data sheet) a system is required to be in place to ensure the curing temperature is above 21°C. In order to improve the early age strengths further, the dry-blended HP-S10 and mixing water should be kept above 21°C as well.
This report is intended for use as a guide only. Please consult the Technical Services Department of King Packaged Materials Company for further information regarding the use of HP-S10 for a specific application.
Compressive Strength Conversion Factor: 1 MPa = 145 psi
HP-S10 is a high performance concrete capable of reaching high early and later age compressive strengths while maintaining excellent durability. The product can be used in many applications including infill strips for precast bridge replacement, rapid bridge replacement, bridge deck patch repair, expansion joint replacement and other concrete repair or new construction applications requiring high performance concrete. While HP-S10 is capable of reaching high early age strengths (i.e. at 12 and 24 hours) it is still sensitive to temperature, since the product uses conventional Portland cement-based technology. As with any Portland cement-based concrete the lower the temperature of the constituents (i.e. cement, aggregate, water) and the curing temperature, the longer the concrete will take to set, generate heat and begin developing compressive strength. Therefore, a study was undertaken to determine the early age compressive strength of HP-S10 at varying plastic concrete temperatures and concrete cylinder curing temperatures.
The test protocol involved batching HP-S10 at plastic temperatures of 5°C,13°C and 21°C and then placing the concrete cylinder specimens in a temperature controlled curing apparatus immediately after casting at a curing temperature of either 5°C, 13°C or 21°C. The concrete cylinder specimens were tested for compressive strength at 12 hours, 24 hours and 28 days and the results can be seen for the 5°C, 13°C and 21°C curing temperatures in Figure 1, Figure 2 and Figure 3, respectively. It should be noted that regardless of the plastic temperature,the concrete cylinder specimens cured at 5°C did not have sufficient compressive strength to record after 12 hours of curing so the cylinders were tested at 24 hours, 7 days and 28 days of age. It can be seen from the data that the most important variable affecting the 12 hour and 24 hour compressive strength was the concrete cylinder curing temperature, as the compressive strength increased with increasing concrete cylinder curing temperature. It can also be seen that the compressive strength at 24 hours also increased with increasing plastic concrete temperature but to a lesser extent. The plastic concrete temperature and curing temperature had very little influence on the 28 day compressive strength as the values were generally unaffected.
After performing this study, it is apparent that if curing temperatures are expected to fall below 21°C and high early strengths are required for HP-S10 (as per the technical data sheet) a system is required to be in place to ensure the curing temperature is above 21°C. In order to improve the early age strengths further, the dry-blended HP-S10 and mixing water should be kept above 21°C as well.
This report is intended for use as a guide only. Please consult the Technical Services Department of King Packaged Materials Company for further information regarding the use of HP-S10 for a specific application.
Compressive Strength Conversion Factor: 1 MPa = 145 psi