Magnesium ammonium phosphate cement (MAPC) prepared with dihydrogen (NH4H2PO4, ADP) and dead-burned oxide (MgO) is a new type of rapid patch repair material for concrete structures. In order to reduce the costs MAPC mortar, manufactured limestone sands, being more widely-available resource lower cost, was investigated in this study as an alternative quartz sands preparation mortar. The fines we...

This paper investigates the physicomechanical properties of mortar containing high volume of fly ash (FA) as partial replacement of cement in presence of copolymer latexes. Portland cement (PC) was partially replaced with 0, 10, 20, 30 50, and 60% FA. Copolymer latexes were used based on 2-hydroxyethyl acrylate (2-HEA) and 2-hydroxymethylacrylate (2-HEMA). Testing included workability, setting ...

This paper reports an experimental programme on masonry walls composed of handmade solid clay brick and hydraulic lime mortar. Reversed cyclic shear compression tests were carried out the in three different configurations: unreinforced, repaired retrofitted, just retrofitted. Damaged retrofitted with Basalt Textile Reinforced Mortar (B-TRM) tested again to investigate recovery strength, stiffne...

Background: Concrete is the most widely used material in world after water. However, concrete could be damaged under aggressive environments and many structures require repair frequent maintenance. Readymade mortars with without synthetic fibers such as polypropylene acrylic are often mortars. The partial replacement of cement by supplementary cementitious materials use alternative natural agro...

The orientation of steel fibers in magnetically driven concrete and magnetically driven mortar was experimentally studied in this paper using a magnetic method. In the magnetically driven concrete, a steel slag was used to replace the coarse aggregate. In the magnetically driven mortar, steel slag and iron sand were used to replace the fine aggregate. A device was established to provide the mag...

The effects of aggregate characteristics on flow ability of mortar mixtures were investigated. Two types, five single sizes, and three gradations of fine aggregate were considered. Uncompacted voids of the aggregates were measured. Flow properties of 166 mortar batches made with the aggregates, together with different sand-to-cement ratios (s/c) and water-to-cement ratios (w/c), were evaluated ...

Unreinforced masonry is that in which the tensile strength of the masonry is taken into consideration in design. Allowable out-of-plane tensile stress values are a function of the mortar type, such as Portland cement/lime mortar vs. masonry cement mortar or type M or S mortar vs. type N mortar. The allowable tensile stress is also a function of the masonry construction, such as tension parallel...

Due to their physical and chemical properties, mortars made with lime are considered to be more compatible with historic fabrics than those made with artificial cements. This paper explores the mechanical properties of clay brick masonry bound with hydraulic limes of different strengths, and hydrated calcium lime (CL90-s) with no hydraulic properties. Masonry wallettes built with a CL90-s morta...