Sands

More Info On Sands

Among the high-utility aggregates engaged at construction sites—Sand happens to be one of the most heavily relied on and is almost an invariable factor in all major concreting aspects of construction work. Physical attributes of sand are contingent on the geological conditions of its sourcing area imparting variance in colour, size and texture. Its diverse features are a direct result of the variations in its physical form which impact its functions as an aggregate and are worth considering for the sake of matching the compatibility of the commonly available sand categories to their consistent range of applications.

Polymeric—the Jointing Sand

Integral to paving projects jointing sand binds the final layers of pavers to arrest the possibility of any opening. Traditionally, the jointing role belonged to regular beach sand that enjoys a naturally rounded and smooth texture but always carried the threat of being moisture-laden and is susceptible to rain washouts. Regular sand if kiln dried performs better at protecting the paving joints from capitulating to water seepage. The polymeric formulation involves the use of polymers as preservatives to improve the quality of the sand which improves the quality of the joint finish, in order to preserve joints for greater periods, shielding the joint layer from weakening by moisture and weeds.

Pit Sand

Angular and sharp are the two features most associated with pit sand which help the particles interlock better in a concrete mixture. Sourced from pits away from littoral locations, its reddish-orange colour betrays the presence of iron oxide on its surface. But it’s the absence of salt in its composition, preventing the absorption of moisture, which adds greatly to its qualification in being considered suitable for use in construction around metals. Pit sand is an inalienable part of concrete mixtures for its superior binding strength which imparts reliable durability to the structure.

Natural River Sand

Associated with screeding, plastering and rendering work in general on construction sites—Screeding sand or river sand as it’s commonly known has smooth and well rounded particles, which make it an excellent aggregate for surfaces requiring smooth finish. River beds happen to be the mining source for this white or light-gray coloured sand. The presence of silica in screeding sand is unavoidable therefore use in construction projects require the presence of silica to be as low as possible as high levels of silica in the sand tend to leave a powdery crust on the walls.

Artificial Sand

Manufactured sand is similar in size and function to natural river sand which makes it a good substitute for the natural aggregate in concrete mixtures. Since it’s manufactured it reduces the burden on ecological imbalance caused by mining of natural river sand. These tend to be gray in colour and have high concrete strength with the absence of silt. Absence of oversized material and moisture ensure zero waste and eliminate the possibility of effloresce, respectively. Extra-water consumption during  concrete mixing along with wall finishes lacking the smoothness of natural sand are the only significant parameters that challenge the effectiveness of  artificial sand when compared to its natural counterpart.