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This paper examines the structural, workability, physical and mechanical properties of (mass concrete) with the inclusion of microcapsule of Zinc oxide (ZnOMC) with a size (0.5) µm and in different percentages (0, 0.5, 1 and 1.5) % of cement weight. The proportions of the concrete mixture were (1:2:4.8) and the water-cement ratio (W/C) was 0.4. 0.6% of Superplasticizer (SP) by weight of cement with all concrete mixtures was added. An SEM analysis employed to obtain a better view of the concrete behavior with ZnOMC. Referring to the analysis and discussion, it was found that the types of microcapsule used to have an effective effect on the compressive and flexural strength and mechanism of sealing the crack, also the highest percentage of microcapsule which there has a positive contribution towards mass concrete properties have been recorded.

Various nanoparticles have been developed for bio-applications. However, nanocomposites particles, (NCPs) with effective and ability to sensing cholesterol, are still needed. Herein, we present new cholesterol and pH-responsive NCPs as sensor particles to promote sensitivity. The traditional method of mixing and grinding was used to fabricate the oxides of magnesium and manganese MgO–MnO 2 NCPs with different mixing ratios. Structural properties, detection of cholesterol, and pH sensitivity were examined. Results propped the high efficiency of MgO–MnO 2 NCPs compared with individual oxides (MgO and MnO 2 ), low response time, while the analytical results confirmed the homogeneous structure of MgO–MnO 2 NCPs. Particle size distribution results for NCPs were within 16.4 to 100 nm, which makes it promising in medical and bio-applications.

Adequate slurry design is critical to the success of a cementing work. In this study, a ball mill procedure was used to prepare a nano powder from a fly ash material supplied by Al-kufa Cement Factory for re-inforcing the oil well cement through using it as a partial replacement of oil well cement class G by a weight percentage of(0.25%,0.5%, 0.75% and1%)and micro fiber polypropylene at percentage (0.25%,0.5%,0.75%,and 1%).The mix with a water to cement ratio was made at 0.44.Characterizations of the prepared samples were conducted by X-Ray Diffraction (XRD), Atomic Force Microscope (AFM), density and compressive strength. The results manifested that the structural properties were improved with the development of calcium silicate hydration (C-S-H)phase, the density as well as the enhancement in compressive strength. That makes it proper for the oil well applications.

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