Construction and Building Materials

In oil-well cementing, the enhancement of early age compressive strength is significant since it decreases the waiting time on cement (WOC) and thus saves the rig working hours. Apart from that early compressive strength helps to prevent the leakage of formation fluids into the wellbore during the cement setting. By doing so, well integrity and productivity is improved.

The electromechanical impedance data of cementitious materials

Excel file of all testing result of three grade of geopolymer concrete are uploaded.

Fatigue life for a high-strength grout under two loading frequencies.

Sorption balance and cup test results.

Curves obtained in flexural tensile tests.

compressive-shear composite performance tests of SAP concrete

The fire resistance of cement-based composite mortars is highly dependent on their mechanical, chemical, and thermal characteristics. This study presents the results of an experimental investigation on the mechanical properties and microstructure of nano-calcined montmorillonite clay (NCMC) cement mortars at high temperatures. The NCMC was prepared via thermal activation of nano-clay, and the produced mortars with progressive NCMC replacements were subjected to temperatures of up to 900 °C. The fire-resistance properties of the produced mortars and their role were analysed through thermo gravimetric analysis, X-ray diffraction, and scanning electron microscopy. Both the residual compressive and flexural strengths of mortars containing NCMC improved after the addition of NCMC. However, the residual compressive strength was enhanced more than the flexural strength, owing to the higher sensitivity of the former to microcracks emerging at elevated temperatures. Microstructural results revealed that the use of thermally treated NCMC having a high surface area and aspect ratio reduced the density and width of microcracks, reduced CH to further produce CSH gel, and strengthened the matrix; these findings explain the higher residual mechanical strengths of the thermally treated NCMC mortars. Furthermore, the mass-loss behaviour improved. The optimum NCMC replacement was determined to be 3% by weight.

Structural Response of Concrete Pavement Slabs under Hygrothermal Actions

The dataset belongs to the physical and mechanical properties of the surface-densified wood.