Which material can we use to replace for fine aggregates?

Agricultural wastes used as a fine aggregate replacement in concrete. The Agricultural wastes used as fine aggregate in concrete are sugarcane bagasse ash, groundnut shell, oyster shell, sawdust, giant reed ash, rice husk ash, cork and tobacco waste.

Can clay be used for concrete?

Sand and Clay Makes Concrete Concrete is a mixture of sand, gravel and cement. Since neither clay soil nor sand contains cement, it can’t form concrete.

Why clay is not used in concrete?

One important question is how ultrafine materials, those in the size range of 5μm, affect concrete properties. It has long been known that clay particles, which are in this size range, are harmful to concrete because of their ability to absorb water and swell, which increases water demand.

What can be used as aggregate in concrete?

Gravels constitute the majority of coarse aggregate used in concrete with crushed stone making up most of the remainder. Natural gravel and sand are usually dug or dredged from a pit, river, lake, or seabed. Crushed aggregate is produced by crushing quarry rock, boulders, cobbles, or large-size gravel.

Which material can we use to replace for coarse aggregates?

Coconut shells can be available in adequate quantity. According to study on coconut shell concrete it is found that the course aggregate in concrete can be replaced by coconut shell and it gives 65\% strength that of conventional concrete.

What materials can be added to concrete to make it stronger?

You can add more Portland cement to bagged concrete to make it stronger. You can also add hydrated lime. To make the strongest concrete, the sand should be sourced from volcanic lava that has a high silica content.

Can clay and cement mix?

The mixing of soft clays with cement as a chemical stabilizer has become a well-known stabilization technique. The resulting strength of the clay–cement mix is controlled by different factors, but mainly the water to cement ratio, the cement content, and the curing conditions.

Is clay similar to cement?

Its processing resembles that of conventional concrete and it uses a similar infrastructure. “Our technology gives clay construction nearly all the processing benefits of cement, while being about 2.5 times cheaper and 20 times more environmentally friendly,” explains Landrou.

Is clay a concrete aggregate?

Aggregates are one of the components of concrete that have properties to be fulfilled before being used. The cleanliness of the aggregates is required by all the standards of construction. Among the undesirable matters in the aggregates, there is clay.

How does clay affect cement?

Clay mineral was found as a major portion of micro fine gravel coatings. It has been widely reported that the compressive strength reduces and shrinkage increases in concrete due to presence of clays in aggregates.

Can sand be replaced by Clay in construction?

Sand cannot be replaced with clay. Clay is an impermeable material which resist passage of water through it either in or out. It exhibits expansive behaviour too which is very undesirable for construction purpose. Usage of clay might result in differential settlements.

What is the best substitute for aggregate in concrete?

For eg. cement can be replaced in certain percentage by mineral admixtures such as GGBS, micro-silica and rice husk. Complete or Partial replacement in any one of the components of concrete depends on the design requirement and availability of the substitute at site. Replacement of coarse aggregate is very hard to do.

What is the difference between fine and coarse aggregates?

The fine and coarse aggregates generally occupy 60\% to 75\% of the concrete volume (70\% to 85\% by mass) and strongly influ- ence the concrete’s freshly mixed and hardened proper- ties, mixture proportions, and economy. Fine aggregates (Fig. 5-1) generally consist of natural sand or crushed stone with most particles smaller than 5 mm (0.2 in.).

Can concrete be produced using partial replacement of cement by waste materials?

This study includes previous investigation done on the mechanical and chemical properties of concrete produced using partial replacement of cement by waste materials. Content may be subject to copyright. 1. School of technology, RK University, Rajkot