What Are The Disadvantages Of Concrete

2 Reduced waste: With improved systems there would be reduction in waste and fewer defects in the products. This will help in adding to the profits. Logistical improvements will help in better organisation of physical space required and viable transportation and reduction in the waiting times for the materials required, thus giving lesser room for wasting time.

The amount of work in progress is minimized. Fewer tools are needed. The parts do not have to travel between the work stations. The control systems becomes redundant, everything takes place in the garage.

This way WCC Technologies would get the material when they needed it without delay and without having to store unused materials or materials that could eventually be obsolete.

This is the most recent type of concrete formwork. It’s an emerging tech for RCC construction as well as architectural design work. This materials’ flexibility creates the ability to make concrete of any shape.

Aggregate is one of the basic constituents of concrete. Its quality is of considerable importance because about three-quarter of the volume of concrete is occupied by aggregates. One of the physical properties of aggregate that influence the property of concrete is the grading of aggregate. The grading of aggregate defines the proportions of particles of different size in the aggregate. The grading of fine (size < 5 mm) and coarse (size > 5 mm) aggregates are generally required to be within the limits specified in BS 882: 1992.

The manufacturing cost can be lower as the rearrangement of the production line to meet urgent order can be minimize or even eliminated.

The definition of high strength changes over the years as concrete strength used in the field increases. Any construction activity requires several materials such as concrete, steel, brick, stone, glass, clay, mud, wood, and so on. However, the cement concrete remains the main construction material used in construction industries. For its suitability and adaptability with respect to the changing environment, the concrete must be such that it can conserve resources, protect the environment, economize and lead to proper utilization of energy. To achieve this, major emphasis must be laid on the use of wastes and byproducts in cement and concrete used for new constructions. The utilization of recycled aggregate

For those used to concreting on dry condition, concreting under water presents various challenges. Transporting, compacting, quality control, finishing and accuracy must all be carried out successfully in this different, and often difficult, environmental conditions. There are, however, many common aspects, chief of which is that air is not required for the setting and hardening of concrete – it sets and hardens just as well, and often even better, under water. Moreover, it must be fluid enough to flow into position and be self-compacting as conventional vibration is not practicable under water. During transporting and placing, conventional concrete and water must be kept apart and, when they inevitably do come into contact, rapid interface flow must be minimized or cement may be washed out to form a weak layer. Washout can be avoided by the use of an admixture to make the concrete non-dispersible but this comes at a cost and contractors unwilling to pay the additional expense involved often adhere to the more traditional methods of placing under water.

• A decrease in rework and setup times due to optimal lot and batch sizes

One advantage is that to minimize the man power in the industry conveyers are used to move items from one place to the other. As in some industries load is very heavy that it is unable to move by one or

*Prof. S.D. Bhole et al.., ‘Effect of Micro-Silica on Mechanical Properties of Concrete’. The author concludes the effect of partial replacement of cement by silica fume (micro-silica), studies have been conducted on concrete mixes for M40 grade at 0%, 3%, 6%, 9%, 12% & 15% replacement levels of micro-silica (17).

The design and construction contract offers the following advantages: shorten design time Simplify construction plans, alternatives to value engineering are always available for discussion and analysis, reduce construction schedule, minimize communication channels with a single point of contact, minimum change orders, quick calendar, adapted to the actual conditions of the site easily, identify the elements with a long previous term, allowing to repeat the project.

In order to produce High Performance Concrete, cement which containing as little C3A as possible should be used during manufacture process. This is because the lower amount of C3A, the easier to control the rheology properties on cement. Other than that, the cement-super plasticizer compatibility problems can also be reduced. Finally from strength point of view, this cement should be finally ground and contain an appropriate amount of C3S.

In general, the durability of concrete covers directly on the ease or difficulty of fluid transport within the concrete, and classified as a concrete or too little permeable. The main transport agent fluid is water in the concrete, which may be pure or contain aggressive agents, such as dioxide carbon and oxygen. The displacement of these elements will depend on the concrete structure hydrated cement paste (Neville, 1997). THE Concrete durability of recycled aggregates also it depends on the ease or otherwise of transport these fluids. Olorunsogo and Padayachee (2002) studied properties related to the durability of concrete as the conductivity of chloride ions, sortividade permeability to oxygen and water, containing percentages of 0%, 50% and 100% replacement of natural aggregates by recycled. The results showed that the durability decreases increases in proportion as the percentage of replacement for all properties evaluated. However, these properties improve with increasing age and with percentages of 50% recycled aggregates in the

It is certified that this report on industrial training at JK Lakshmi Cement Plant, Sirohi, Rajasthan is the bonafide work of “PRAKHAR WADHAWAN” who carried out the training under our guidance.