A short pointing iron allows more pressure to be exerted. Before casting, a variety of tests were conducted to determine the fresh properties of the mortar. Besides, the morphological changes and damage characteristics of the specimens were observed. Before construction begins there are several important aspects to consider, to ensure a successful repair. Besides, the failure modes of mortar specimens in bond strength test can generally be categorized into two types, namely, pure interface failure; interfacial failure combined with old mortar substrate fracture.
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Helps improve frost resistance, less damages to screed, render and joint grout for masonry caused by frost. Mortar additive for render and gauged render. Likewise, the presence of fibers also lowers the number and the width of cracks in the mortar or concrete due to the bridge action of them [ 17 ]. When contents of PP fibers and BF of 2. Also, the effect of PP fiber on the abrasion resistance of the mortar is more significant than BF. The specifications for a project should describe in detail what is expected in each of these areas. Chennai Madras , India Date:
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When PP fiber, BF of 0. Pre-wetting also keeps the joint damp longer, allowing better curing of the mortar while reducing the risk of staining during application. Correct and incorrect ways of raking the joint in preparation for repointing. The end result will be a mortar that performs poorly. This may take some time to load. Preparing the joint is the critical first step in the repair work. The joint should first be wetted to minimize the loss of water from the fresh mortar into the masonry by capillary action.
Since permeability is related to the porous internal structure of the material and to the linkage with the external material surface, relevant studies have been carried out by some researchers. The amount of water added to mix a repointing mortar is less than the amount added for mixing a bedding mortar for laying masonry units. Chennai Madras , India Date: Fresh mortar joints should be protected from rain, wind and sun and kept damp for three to seven days. For instance, very few studies focus on the effect of fibers on fresh properties and durability properties of FRM and FRC, such as the abrasion resistance, which is one of the most significant requirements for hydraulic structures.