It was observed that, at 0.40% concentration, the initial and final setting times of the AB sample was longer by 1,954 min and 3,767 min, respectively, than those of the ATMP sample. However, the fitting curves for the setting time of AB presented an exponential relation in the concentration range of 0.02% to 0.20%, and exhibited a linear relation at the addition dosages from 0.20% to 0.40%. The results showed that the fitting curves for the setting time of amino trimethylene phosphonic-based material (ATMP) exhibited a linear relation in the concentration range of 0.02% to 0.40%. The hydration characteristics of the Portland cement containing AB were investigated using isothermal calorimetry measurements, X-ray diffraction, thermogravimetric analysis, Zeta potential, and scanning electron microscope. The setting time at different temperatures, and the compressive strength of the cement pastes containing AB were examined. The study was aimed to lay a solid foundation for the utilization of AB in large volume concrete by reducing the temperature control measures. The present study envisaged the development of a novel admixture based on the composites of amino trimethylene phosphonic acid and boric acid (AB) that exhibited an intense inhibition of the hydration effects for Portland cement.
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