The study presents important findings on predicting the
behavior of a Portland cement-based mixture, specifically regarding hydration.
Supplementary cementitious materials (SCMs) such as ground granulated blast
furnace slag (GGBFS), often called slag cement, fly ash (FA), and silica fume
(SF) are widely used in cementitious composites due to their durability,
environmental friendliness, and minimal cost. Portland cement is usually
substituted with granulated blast furnace slag (GGBFS) to make a blended cement.
A slag-blended cement has a more complicated hydration process than Portland
cement due to the interactions between the slag reaction and the hydration of
Portland cement in the cementitious systems. Understanding the effect of slag
substitution on the hydration of cement is still challenging. To achieve this,
the extended CEMHYD3D model was employed to predict the hydration of a
slag-blended cement. An OPC as a reference cement confirmed to ASTM C 150 and a
slag confirmed to ASTM C 989 standard requirements were used in this study. The
simulation was done with cement paste samples made with various w/c ratios and
different slag substitution levels, in which the interaction between the
hydration of Portland cement and the reaction of slag was considered. The
prediction model has been validated with experimental results and verified to
be successful in predicting the hydration of slag-blended cement. The
consideration of the chemical composition of slag improves the predictability
of hydration in cement, and the same method was applied in this model. Both in
the early age and up to the age of 90 days, the hydration of slag-blended
cement can be predicted with the proposed model.
Author(s) Details:
Andualem Yadeta,
Department of Civil Engineering, Delhi Technological University,
Delhi 110042, India and Department of Construction Technology and Management,
Madda Walabu University, Bale Robe 242, Ethiopia.
Pradeep Goyal,
Department
of Civil Engineering, Delhi Technological University, Delhi 110042, India.
Raju Sarkar,
Department of Civil Engineering, Delhi Technological University,
Delhi 110042, India.
Please see the link here: https://stm.bookpi.org/TAER-V5/article/view/13293
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