Category: BUILDINGS

HOW TO PROTECT SUBSURFACE MOISTURE 0

HOW TO PROTECT SUBSURFACE MOISTURE

By Donald Baerman In this article, I will be discussing subsurface moisture protection and the effects of groundwater on buildings. Since waterproofing of the subsurface portions of a building is difficult to remedy, the reliability of the waterproofing and moisture control strategies is critical. Methods of moisture control of substructures include: Dampproofing, which retards the passage of water in the absence of hydrostatic pressure. Waterproofing, which prevents the passage of...

REINFORCEMENT IN CONCRETE 1

REINFORCEMENT IN CONCRETE

Reinforced Concrete Reinforced concrete Is the process of strengthening concrete by embedding steel in concrete which act together in resisting compressive strength of the concrete and tensile strength of the steel. Reinforced concrete is one of the two structural materials used in engineering construction and building works. Concrete is strong in resisting compressive stress but comparatively weak in resisting tensile stress. The tensile strength of concrete is between one tenth...

SITE FACILITIES AND THEIR IMPORTANCE 0

SITE FACILITIES AND THEIR IMPORTANCE

After the site visit, the contractor should prepare a layout plan base on his information. This should show : access road, the concrete mixer and stock piles of fine and coarse aggregate, water source, offices, stores, shades, canteen, timber stack, reinforcement rack, etc. WHAT ARE SITE FACILITIES Site facilities are preliminary facilities required on site for effective project execution. They allow for assembling and dismantling after practical completion of works....

WATERSEAL: USES AND APPLICATION IN CONSTRUCTION 0

WATERSEAL: USES AND APPLICATION IN CONSTRUCTION

What is Waterseal? Waterseal is a waterproofing compound highly concentrated in powder form used in construction of all concrete structures which need to be protected from water. How to apply Waterseal in building construction Two percent of the compound by weight should be mixed with cement to obtain water repellent properties. One bag contain 1kilo of the Waterseal which is sufficient for one bag. After the measurement, Waterseal should first...

CURING OF CONCRETE 5

CURING OF CONCRETE

WHAT IS CURING ? Curing is the process of maintaining moisture on the surface of the concrete which helps the concrete to gain strength. Concrete gradually hardens and gain strength after its initial set. For this hardening to proceed and the concrete to develop its maximum strength, there must be water present in the mix. During the early days after the initial set, there is rapid loss in water, the...

HOW TO PRODUCE CONCRETE 4

HOW TO PRODUCE CONCRETE

There are two ways of manufacturing concrete namely : nominal mix and design mix. Nominal mix is used for normal construction works such as small residential buildings. Most popular nominal mix are in the proportion of 1:2:4. Design mix concrete are those for which mix proportions are finalized based on various lab tests on cylinder or cube for its compressive strength. These tests are conducted to find suitable mix based...

CONCRETE 8

CONCRETE

Concrete is a mixture of construction materials comprising of cement, fine (sand) aggregates and coarse (gravel) aggregates with water for hardening. The most commonly used type of cement for concrete is Portland Cement. Uses of Concrete Concrete is used for the construction of foundations, columns, beams, slabs in construction. Components of Concrete These includes cement, sand, aggregates (fine and coarse) and water. The cement paste which is the mixture of...

AGGREGATE IN CONSTRUCTION, TYPES AND CHARACTERISTICS 4

AGGREGATE IN CONSTRUCTION, TYPES AND CHARACTERISTICS

Aggregates are particles of broken stone and sand which form the major component parts of concrete. Aggregate materials commonly used for concrete are sand and gravel. In construction, the material which binds the aggregates together is cement and it is described as matrix. Characteristics of Aggregate Aggregate for concrete should be hard and durable. It should not contain materials like clay, coal or pyrites that decompose or change in volume...

DAMP PROOF MEMBRANE 3

DAMP PROOF MEMBRANE

A Damp-proof membrane is a polyethylene sheet laid under a concrete slab to prevent the concrete from gaining moisture through capillary action. It is a membrane applied to prevent moisture rising through the structure. Concrete is spread oversite as a solid base for floors and as a barrier to prevent moisture rising from the ground. Concrete is known to be permeable to water and will absorb moisture from the ground....

TYPES OF FOUNDATIONS 1

TYPES OF FOUNDATIONS

Foundation in construction are generally classified into two, namely Shallow Foundation and Deep Foundation. Shallow Foundation transfers the load to a stratum present in a shallow depth. While the deep foundation transfers the load to a deeper depth below the ground surface. High-rise building like a skyscraper or a building constructed on very weak soil requires deep foundation. If the constructed building has the plan to extend vertically in future,...