In this thesis, the using of B[OH]3 as source of B2O3 and the using of chemical additives as the setting accelerator and the alkalinity increaser of the mortar pore water to the cement hydration, for setting time and mechanical strength were investigated. As a result of the findings, the concrete was produced by the appropriate chemical additives for the highest ratio % B2O3. Also two different types (control) concrete was produced by using boron modified active belite cement (BAB) and portland cement as binding material. On produced concretes as three different types, various fresh and hardened concrete experiments were performed and the data obtained were compared with each other.As a result, boron compounds may be used as additives to control hydration of cement, the delay of the hydration reactions can be controlled by use of sodium aluminate contribution was determined. However concrete samples of BAB were showed more neutron absorption capacity than the control samples, the expected benefits from concrete samples of BSA has not been provided. This stuation was thought to be due to that BSA concrete has approximately 3 times lower B2O3 / cement ratio by weight compared to BAB concrete. Also according to the results obtained was determined that there is not a positive effect of boron additives in concrete strength under the high temperatures. Keywords: Boric acid [B(OH)3], cement hydration, the high temperatures, the mechanical properties, the neutron absorption capacity, the setting time.
Tez (Yüksek Lisans) - Süleyman Demirel Üniversitesi, Fen Bilimleri Enstitüsü, Biyoloji Anabilim Dalı, 2014.
Kaynakça var.
In this thesis, the using of B[OH]3 as source of B2O3 and the using of chemical additives as the setting accelerator and the alkalinity increaser of the mortar pore water to the cement hydration, for setting time and mechanical strength were investigated. As a result of the findings, the concrete was produced by the appropriate chemical additives for the highest ratio % B2O3. Also two different types (control) concrete was produced by using boron modified active belite cement (BAB) and portland cement as binding material. On produced concretes as three different types, various fresh and hardened concrete experiments were performed and the data obtained were compared with each other.As a result, boron compounds may be used as additives to control hydration of cement, the delay of the hydration reactions can be controlled by use of sodium aluminate contribution was determined. However concrete samples of BAB were showed more neutron absorption capacity than the control samples, the expected benefits from concrete samples of BSA has not been provided. This stuation was thought to be due to that BSA concrete has approximately 3 times lower B2O3 / cement ratio by weight compared to BAB concrete. Also according to the results obtained was determined that there is not a positive effect of boron additives in concrete strength under the high temperatures. Keywords: Boric acid [B(OH)3], cement hydration, the high temperatures, the mechanical properties, the neutron absorption capacity, the setting time.