What is Plum Concrete?
For massive concrete foundations that are constructed, stones of about 150 millimeters in size or more, which is as much as 30 percent of the total volume of concrete are mixed with the cement that is wet. This is a benefit to the economy and reduces the amount of heat generated. Concretes like this are known as plum concrete.
After a minimum 2 layers of concrete are finished, well-shaped, and thoroughly washed, angular stone pieces that have a dimension of not more than 60 percent of the pour thickness are inserted into the concrete, ensuring an area of at least one-and-a-half times of the largest size of aggregates that are in the concrete. Also Read: Sandblasted concrete Also Read: Top construction companies in USA
The bottom of the stones must be buried in wet concrete to prevent gaps at the bottom. The concrete is poured without stopping.
Application of Plum Concrete
A common use of plum concrete beneath footing is to form a footing’s base to ensure that water that flows from the footing does not get into the ground below.
Plum Concrete is able to be used in areas where concrete placement is required like concrete dams and bridges piers. In these cases, small stones that measure 150 millimeters in size serve to serve as fine gravel to mix plum concrete. Also Read: What is floor joists. Also Read: Concrete frame structure
The concrete was made of plums made from 150-millimeter size plums with an efficient cement content of 177 kg/m3 was used to construct the dam of the dam’s original structure. Also Read: What is beam and column
It was thought that with the latest high-speed mixers that have enough capacity, a robust concrete mix with 150 MSA could be made quickly.
Similar to a different scenario, let’s say that you consider that the base pit for the machine’s bed is thought to be of a specific depth, however, the hard stratum could be located 3 meters below the level below.
In the layout, it had been suggested the thickness of the bed’s foundation could be 1.5 meters. Also Read: Cedar wood menards
The foundation has to be placed on the hard soil strata and therefore, plum concrete with a thin ratio of 80mm-100millimeter sizes stones will be made, and then rammed to 1.5 meters and then, after a built raft, footings could be laid. Also Read: Free window replacement programs
Purpose of Plum Concrete
Plum concrete can be used to reach the necessary surface level beneath the footing and foundation. It can reduce the price of PCC when the PCC thickness that is required is significant. It is mostly used in massive concrete works like side slops, barriers as well as gravity dams.
For example, in an effort to construct a house the tiny area beneath a footing can be too steep to be used plum concrete. Also Read: Composite roof installation. Also Read: Types of crawl space insulation
Process of Plum Concrete
1. Transportation of concrete from Plum concrete:
The boulders are about the size of a rock (Size) near about 300 millimeters and can be easily lifted by laborers without difficulty. They are neither too large nor too small. Also Read: Government programs for roof replacement
2. Prior to placing the concrete plum to be left and cleaning:
The initial step first taken is the cleansing and leveling of the surface through the elimination of soil that is soft, which can lead to a lower capacity forbearing.
After cleaning and grubbing after grubbing, water is sprayed onto the surface in order for it to become moist prior to the concrete is laid out in a plum fashion. Also Read: Low income roofing assistance
The purpose of spraying water is to guarantee an appropriate bonding of concrete with the surface of the ground.
After a sprinkle of plain water, anti-termite chemical sprays, which is crucial today for the ideal foundation for the construction.
3. Pacing and Spreading:
The boulders are distributed across the ground, with tiny gaps between layers and concrete has been applied by pumping all over the boulders within each layer. It gradually permeates into the gaps between the boulders.
This helps to bond it correctly, following pouring concrete, the boulders are thrown into the concrete and the procedure is repeated until the smooth surface is achieved. Also Read: Cantilever truss bridge
4. Plum Concrete curing:
Curing must be carried out within the next 7 days or at a lesser time. Jute bags are placed over the entire surface of the concrete plum to hold the moisture for a lengthy period after the curing. Also Read: What is bond breaker
Specifications and Details of Plum concrete
Each layer’s maximum height of a plum concert was 900mm. didn’t exceed the maximum height within one layer
Maximum crevices within one layer of 150 mm.
The amount of the material from the concrete will not exceed 40 percent (percent) of the total volume. Also Read: Steel building skeleton
The concrete used in this project is Plum. It’s M10 grade concrete in the concrete aggregate up to size of 25mm.
Plum will consist of black trap basalt with a crush strength of 100 Kg or less /Sq.cm.
Concrete density of Plum 1650 kg/Cubic.meter
The nominal dimension of the coarse aggregate must be as large as it is within the limit set by the manufacturer but not more than one-fourth of the minimum thickness as long as the concrete can be placed with ease in a manner that it covers the reinforcement completely and complete the gaps in the shape. Also Read: Government grants for roof replacement
Regarding the requirement of the aggregate size that can be used from the concrete plum, there are various recommendations from the IS code. The code suggests that for the vast majority of the typical works, the 20-inch aggregate size is ideal and appropriate. Also Read: Top ten cement brands in india
If there aren’t any limitations for concrete flow, parts 40mm or greater, it is also used. But, if you see reinforcement or where the cover is not large and the formwork is all there 10-millimeter nominal maximum size plums are recommended in concrete plums. Also Read: low-income roof repair assistance
The size of the plums is 150mm and in the vicinity of any reasonable size can be used in concrete work that is plain with a maximum of 20 percent in a quantity of concrete, if allowed by the engineer in charge. Also Read: Concrete Floor Topping
In all instances, the plums are likely to be evenly distributed and not be more than 150 millimeters away in distance from each other.