Coordinates: 29°51′55″N 77°54′12″E / 29.86528°N 77.90333°E / 29.86528; 77.90333The Central Building Research Institute (CBRI) at Roorkee, Uttarakhand, India, is a constituent establishment of Council of Scientific and Industrial Research, India and has been vested with the responsibility of generating, cultivating and promoting building science and technology in the service of the country.The Institute maintains relationships with national and international standards-setting groups like CIB in the Netherlands; TWAS in Italy; BRE in the United Kingdom; ASTM in the United States; CSIRO in Australia; RILEM in France; BRS in Canada and UNCHS in Nairobi, Kenya.Since its inception in 1947, the Institute has been assisting the building construction and building material industries in finding timely, appropriate and economical solutions to the problems of building materials, health monitoring and rehabilitation of structures, disaster mitigation, fire safety, energy-efficient rural and urban housing. The Institute is committed to serving the people through R&D in the development process and maintains linkages at international and national level.At the national level of India, the Institute has close interaction with BMTPC, HUDCO, DST, Ministry of Urban Development, Ministry of Rural Areas, Housing Boards and Societies of the State Governments, engineering and academic institutions, construction and building material industries.
The present study evaluates the coupled influence of curing temperature (27–55 °C) and gypsum addition on laboratory synthesised pure M3-alite (C3S) phase hydration, linking phase evolution and kinetics with microstructural development and C–S–H polymerization. To carry out the study, alite pastes were prepared and cured at 27 °C, 40 °C, and 55 °C for 28 days, with and without 5
This study investigates the stabilization of the metastable β polymorph of dicalcium silicate (belite) through doping with boric acid (H3BO3). Belite, a major constituent of Portland cement clinker, exhibits varying degrees of stability under different conditions. The β polymorph is desirable for its hydraulic activity, but it tends to transform to the less reactive γ form upon cooling. Belite (phase-purity > 95
Reducing CO2 emissions from cement production by developing alternative clinker systems has attracted increasing attention, but studies on the accelerated carbonation of these building products remain minimally understood. This study examines the impact of pure MgO (10-30%) and Al2O3 (1-5%) additions in Carbonatable cementitious binder compositions and evaluates the performance of high-MgO-Al2O3-based low-lime, low-carbon clinker (L3C2) under accelerated carbonation curing conditions. Clinkers were produced from laboratory-grade oxides and high-MgO limestone mining rejects with magnesia content up to 20% by maintaining a lower CaO+MgO/SiO2 ratio of 1.5. Results indicate that MgO incorporation up to 20-25% in the pure oxide composition maximized CO2 uptake (15.5 wt% at 1 day) through the formation of hydrated magnesium carbonates (HMC) and polymorphs of Ca and Mg carbonates, whereas excessive MgO (>25%) reduced reactivity. Al2O3 addition (similar to 2.5%) improved early-age strength (59.9 MPa) by forming calcite and aluminosilicate hydrates with a carbonation efficiency of 12.8%. However, combined MgO-Al2O3 systems exhibited lower CO(2)uptake (8.14%) compared to MgO-only mixes. These findings highlight optimized MgO content (15-25%), moderate Al2O3 addition, and controlled carbonation curing (7 days) as key strategies for reducing limestone mining rejects and sustainably developing low-carbon cementitious materials. The paper also addresses key focus areas for maximizing carbon reduction potential through Life Cycle Assessment (LCA) Studies.
This study investigates the multifunctional performance of cement mortars modified with microparticles of boron oxide (B2O3), lead oxide (PbO), bismuth oxide (Bi2O3), and tungsten oxide (WO3) at varying dosages (1-5 wt.
