(57) A method of forming a cement composition. The method comprises adding to a hydraulic cementitious material a first strength-enhancing agent and a second strength-enhancing agent, wherein the content of total alkali (Na20 equivalent) in the hydraulic cementitious material is less than or equal to 0.7 % by weight of the cementitious material. The first strength-enhancing agent includes a compound represented by structural formula (I):
the second strength-enhancing agent is sodium sulfate, potassium sulfate, or a mixture thereof. The example values of the variables in structural formula (I) and the example amounts of the first and second strength-enhancing agents being added are defined herein.
(71) GCP Applied Technologies Inc., Cambridge, MA (US)