Apple chemie

REPAIR OF CEILING PLASTER There are many cases where the steel reinforcements corrode due to various causes such as lack of cover, leakage of roofs, etc. As steel rust occupies very much larger volume (more than 10 times) than steel, the surrounding concrete cracks and tends to get separated from steel and finally it falls down. This is particularly important in the ceiling plaster under leaking roofs. If we notice any disturbance in this plaster, it should be repaired as soon as possible. There are many cases in which the ceiling plaster has fallen down suddenly. The repair for such cases is carried out as follows. 1.       Hammer test the area for loose areas and remove all loose particles of mortar, concrete, rust, etc. from the spalled surface and clean it with a wire brush. 2.       Apply two coats of polymer modified active corrosion inhibitor to the remaining steel. If additional steel is required, tie the new steel to the old steel by binding wires. Two coats o

TYPES OF DEFECTS IN PLASTER The causes and repair methods for each are discussed below. 1. NON-STRUCTURAL CRACKS Crazing is a network of fine cracks, usually in a hexagonal pattern, which measure between 5 and 75 mm across each hexagon. They are usually very fine and shallow and do not extend through the whole depth of the plaster. They are usually the result of over troweling a rich mix (one with high cement content) or using sand containing an excessive amount of dust (more than 15% by mass passing a 0,075 mm sieve). Crazing often occurs within a few hours of the plaster being applied to the wall and cracks may hardly be visible until dust or moisture makes them noticeable. Craze cracks are of little importance, do not open and close with time, and can be covered using reasonable quality paint. If necessary, glass fibre tissue can be applied during the painting operation. Map cracking is similar to crazing except that it is usually deeper (sometimes going through

Good design must not only be safe but must aim to save construction costs, time and materials. The following procedures should help to achieve this and an ‘educated’ client will recognize the importance of funding this work with a realistic fee. 1. DECIDE THE LOCATION OF COLUMNS & FOUNDATION AND TYPE OF LOADS ACTING ON THEM On the building plan, the position of columns and load bearing walls should be marked, and any other induced loading's and bending moments. The loads should be classified into dead, imposed and wind loading's, giving the appropriate partial safety factors for these loads. 2. ESTIMATE ALLOWABLE BEARING PRESSURE OF SOIL USING GROUND INVESTIGATION REPORT From a study of the site ground investigation (if available), the strength of the soil at various depths or strata below foundation level should be studied, to determine the safe bearing capacity at various levels. These values – or presumed bearing values (from any standards or codes) in the

    PROPERTIES OF HARDENED CONCRETE                                                 Flexural Strength Test Arrangement The following are the properties of concrete in its hardened state, used by the designer during design process of reinforced concrete structure. 1.       COMPRESSIVE STRENGTH The characteristics strength is defined as the strength of concrete below which not more than 5% of the test results are expected to fall. As per IS: 456 concrete mix always designed for the target strength computed as, Target strength:  Characteristics strength + (1.65 x standard deviation) M20 is the minimum grade of concrete for use in RCC work. 2. TENSILE STRENGTH Flexural strength is one measure of the Tensile strength of concrete. In concrete structure one set of visible cracks occur under flexure to compute load factor against cracking. According to IS: 456 the tensile strength of concrete can be computed from the compressive strength using empirical relation gi

Management is the science and art of planning, organizing, leading and controlling the work of organization members and of using all available organization resources to reach stated organizational goals. Construction management deals with economical consumption of the resources available in the least possible time for successful completion of construction project. ‘Men’, ‘materials’, ‘machinery’ and ‘money’ are termed as resources in construction Management. Objectives of Construction Management: The main objectives of construction management are, ·          Completing the work within estimated budget and specified time. ·          Maintaining a reputation for high quality workmanship ·          Taking sound decisions and delegation of authority ·          Developing an organization that works as a team. Importance of Construction Management: 1.       Construction management practices invariably lead to “maximum production at least cost”. A good construction ma

The conventional construction methods worked just fine so far and many people who have decided to build a new home therefore wonder why would they choose eco friendly construction over the conventional one as most of them grew up in conventionally built homes. However, the things have changed a lot in the last two decades. Not only is energy becoming more and more expensive due to the increased demand but the humanity perhaps faces the greatest challenge in history – the climate change which is in the first place a result of human actions. And this is where eco friendly construction comes in. The green building methods and techniques are constantly being evolved, however, the existing ones offer two key advantages over the traditional construction methods – more efficient use of energy and reduction of human impact on the environment. As already mentioned earlier, energy is getting more expensive and the costs of monthly energy bills are therefore only getting higher and higher.

Polysulphide Sealant is based on liquid and solid polysulphide polymers which adhere to most of basic civil engineering materials like cementitious substrates The product is used for sealing expansion joints, floor concrete guru cutting areas. After mixing the base component & curing agent in given proportion rubber like material in pourable consistency is for Polysulphide Sealant. AREA OF APPLICATION: ·          It is mainly used for Vertical & floor expansion joints in Industrial, commercial or residential buildings ·          Joints in concrete roads bridges, subways, flyovers & airport runway. ·          Concrete cracks repairs in slab. FEATURES AND BENEFITS: ·          Excellent UV resistance after full cure is over. ·          Can withstand in fully submerged condition. ·          Good chemical & water resistance. ·          Adhesion compatible to most of substrate http://www.applechemie.com/

In the world of construction, many trends come and go. Some fall by the wayside in a short period of time, but others grow to become an integral part of the industry as a whole. Sustainable construction definitely falls under the latter. Green building techniques are reshaping the industry and becoming a fundamental part of new building designs. Construction professionals are using many different eco-friendly design principles to construct new buildings and to renovate old ones. Let’s take a look at these green building techniques as well as developing trends that will define sustainable construction in the future.   1. Modular Construction Techniques to Eliminate Waste Modular construction is a sustainable technique that builders are using to design structures faster, at a more competitive cost, and with maximum resource efficiency. Modular structures can be built within a controlled environment where wastage of resources is minimized and pollution is controlled.