What is a concrete block? A b loquat Concrete is a rectangular parallelepiped prefabricated numerous thin – walled cells, which make them easy to maneuver work pieces and very insulating. They are made from mortars and concretes of dry consistency (small Arid) compressing them and making them vibrate in metal molds. Its prominence grew over the years, from being an element used only in precarious or elementary constructions, to the present, where they are part of various projects where design is present. They are even used in high-rise buildings, thanks to improvements in raw materials and their production techniques.
History of concrete blocks
Since its appearance at the end of the last century, the use of concrete blocks machine in engineering works in developed countries has reached a significant expansion, both in quantity and variety of uses.
As an illustrative fact, it can be pointed out that only in the United States and Canada, more than 5,000 million units are produced annually, equivalent to eight-inch blocks, destined for a wide variety of applications, such as housing construction, large-scale building structures. Of high height, support walls and underground chambers, among others.
The Dominican Republic is the largest producer of concrete blocks in the Caribbean region, with a production of around 10 million units per month, a figure that has been increasing year after year, due to the sustained demand from the construction industry.
This wide use of the blocks is motivated mainly in the advantages that in some aspects present concrete blocks, in relation to other building materials, among which can be mentioned its ease of use, both in simple and structural solutions.
Another of its advantages is the ability to confer properties of surface texture without the need for additional finishes or coatings, with the consequent economic and architectural benefit, in addition to the appropriate thermal and acoustic insulation.
The concrete blocks, in addition, have a lower cost per square meter of wall, in comparison with other materials , due to their characteristics of texture and dimensions, which allow a significantly lower use of labor for their handling.
The quality block has advantages such as reduction of broken units in the work, uniformity in the surface of the walls, thus reducing the deformations that must be corrected with mortar, and the structural guarantee that it offers.
To obtain a wall of concrete blocks with good quality of termination, the practice advises the use of procedures that allow maintaining a permanent control during the execution.
The use of these procedures is essential when you want to take advantage of the block, with the economy that this represents.
Before starting to raise the wall, the support foundation (running shoe, beam or plate) must be clean to facilitate the adhesion of the joint mortar and reasonably level to avoid mortar joints too thick. To carry out a correct stake out of the wall it is important that you plan them in detail.
In the same way, to keep the blocks dry when they are collected on site, they must be sufficiently dry, in order to comply with the specifications regarding the moisture content. To achieve this, it is necessary that the blocks are conveniently stacked, isolated from the ground and covered with rain action.
The concrete blocks should not be wet neither immediately before or during their placement, However, in climates like ours what is styled is to moisten the seating surface, so that the mortar (mixture of sand, cement and water) does not set untimely, taking care not to wet the rest of the block excessively.
Only types of mortar whose resistance is compatible with that of the block should be used. Also, the mortars must be discarded when the time elapsed from their preparation to their use exceeds two hours.