... reinforcements at 1 % of the total mass binder to produce ultra high performance PET reinforced concrete (UHPPRC). The presence of SF between (5 % and 30 %) in UHPPRC increases compressive strength at all ages of 3, 7, and 28 days; the greatest compressive strength achieved was 146.6 MPa by the SF 25 -UHPPRC mix...

... Masonry , whereas the fly ash–to–cement ratio was varied from 0.75 to 3. The water required to achieve a constant flow value of 110 ± 5 % was determined. The water retention of fresh mortar and dry density, compressive strength, and drying shrinkage of hardened mortar were determined. Mortar mixtures...

...Jnyanendra Kumar Prusty; Bulu Pradhan This study presents the application of Taguchi-grey relational analysis (GRA) to investigate the effect of control parameters on flowability, compressive strength, and sulfate and acid resistance of geopolymer mortar (GPM) simultaneously. The control parameters...

...). Mixes made with river sand were used as control mixes (designated as 0SS). All the employed mixes provided the required compressive strength at 28 days. Similar permeability characteristics were observed for the 0SS and 30SS mixes. Chloride ion penetration of the 70SS and 100SS mixes increased with time...

... to be essential for satisfying the durability criteria. Overall, IOSA addition was found to be very helpful in improving the physicochemical, strength, and durability characteristics of the considered soil types. Keywords soil stabilization, lime, inorganic oxides, hydration, compressive strength, tensile...

... investigation was carried out by replacing portland composite cement with 5 % and 10 % ultrafine metakaolin. The results show that the optimum amount of ultrafine metakaolin in concrete mixes is 10 % by weight. For instance, the compressive strength of the concrete specimens with 10 % ultrafine metakaolin (UM...

... materials ratios of 0.40, 0.44, and 0.50 and fly ash levels of 0, 20, and 30 % were studied. Mixtures were tested for workability, entrained air, drying shrinkage, and the ability to maintain a 28 MPa compressive strength requirement. The compressive strength requirement was met by each mixture investigated...

...) model to shed light on the relationship between predictors (nominal coarse aggregate sizes, cement content, water-to-cement ratios, and coarse aggregates content) and each of the different properties (density, compressive strength, tensile strength, and porosity) of pervious concrete. The modeling...

..., the UHPC mortar and paste specimens are transferred into the water at 80°C and left for predesigned testing ages (7, 14, 21, and 28 d). We evaluate the compressive strength of UHPC mortar as well as hydration and microstructural properties of UHPC paste with the analysis of chemically bound water...

...Lajan Burhan; Kawan Ghafor; Ahmed Mohammed This study focuses on the effect of three types of powder polymer (polycarboxylate superplasticizer) in term of setting time of cement, workability, density, and compressive strength of concrete until 28 days of curing. The percentage of the polymer ranged...

... or longer side of the column, radius of the corner, elastic modulus of FRP, total thickness of FRP, and the ratio of the ultimate tensile strength of FRP to the compressive strength of unconfined concrete, are used as predictors to estimate the confinement coefficient of concrete columns wrapped with FRP...

... properties of the normal concrete are enhanced in HPC. The compressive strength of HPC can be considered as a key factor to identify the level of its quality in concrete technology and the construction industry. This parameter can be directly acquired by experimental observations. However, testing methods...

... tested at distinct ages in terms of capillary absorption and oxygen permeability. The results show the ability of CNTs to decrease both capillary water absorption and oxygen permeability up to 42 and 71 %, respectively, depending on the type and amount of CNTs. Compressive strength increased up to 21...

...Sahar Y. Ghanem; Jonathan Bowling Fibers are used to improve the properties of concrete. This article investigates the mechanical properties of chopped carbon-fiber–reinforced concrete (CFRC). The properties examined include workability, compressive strength, splitting tensile strength...

.... The effects of nano-silicon dioxide, nano-aluminum oxide (Al 2 O 3 ), and nano-iron oxide (Fe 2 O 3 ) on the compressive strength and the fluidity of the MPC-based mortar are experimentally investigated in this study. The micromorphology and composition of the MPC-based mortar with nanoparticles were captured...

...Sungwoo Park; Mohammad Pour-Ghaz The abrasion resistance of concrete is considered one of its most important properties in applications such as pavements. Despite the existence of significant amount of research data, the correlation between the abrasion resistance and the compressive strength...

... that show the relationship between the fiber properties such as the aspect ratio (length/diameter), fiber content, compressive strength, flexural strength, and splitting strength of FRC. For ANN modeling, various FRC mixes with only steel fiber are adopted from the existing research papers. An artificial...

... mixed with seawater. Compressive strength and drying shrinkage tests were performed, and the results were interpreted on the basis of the microstructural data obtained through X-Ray Diffraction (XRD) and Differential Scanning Calorimetry (DSC). The results suggest that the phase assemblage...

... to be used as a critical factor for structural-grade concrete. A computational mathematical model is formulated using an artificial intelligence (AI) approach, such as an automated neural network search (ANS) modeling to explore the influence of mix designs on concrete compressive strength at 28 days...

..., the effects of CNFs on certain properties of cement paste and concrete were investigated. For the cement paste, workability, shrinkage properties, and compressive strength were investigated. In the cement paste study, 32 batches with variable CNF concentrations in 4 groups with different water-to-cement (w/c...