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Which PSC cement is best for roofing?
CB Sowmya
A good Portland slag cement should have the following properties Resistance to chlorides and sulphate attacks Resistance to alkali aggregate reaction Reduced cracking Less cracking Easy to pump Good workabiity High durability Give good finishing
A good Portland slag cement should have the following properties
- Resistance to chlorides and sulphate attacks
- Resistance to alkali aggregate reaction
- Reduced cracking
- Less cracking
- Easy to pump
- Good workabiity
- High durability
- Give good finishing
See lessWhat specifications are available in India for low cost and good quality housing construction?
CB Sowmya
One of the low-cost construction methods is using gypsum panels called GFRG panels (Glass Fibre Reinforced Gypsum panels). This technology is widely used in Australia. In India, IIT Madras has been developing the design procedure for these panels. They can be built fast, just like precast panels. UsRead more
One of the low-cost construction methods is using gypsum panels called GFRG panels (Glass Fibre Reinforced Gypsum panels). This technology is widely used in Australia. In India, IIT Madras has been developing the design procedure for these panels. They can be built fast, just like precast panels. Using these panels, only load-bearing structures can be built. IIT Madras claims that it cuts down the cost by 20%, with the buildings having the same life expectancy as the conventional buildings.
However, this is true only if mass construction is made. For a single residential building, the gypsum panels may prove to be uneconomical.
See lessWhat are the geotechnical methods used in seismic prone areas?
CB Sowmya
If it is a hard strata, isolated footings would be sufficient. However, to withstand the seismic forces, all the isolated footings must be connected with one another using a tie beam. This tie beam can resist the differential movement in strata due to the seismic loads. If it is a soft strata, thenRead more
If it is a hard strata, isolated footings would be sufficient. However, to withstand the seismic forces, all the isolated footings must be connected with one another using a tie beam. This tie beam can resist the differential movement in strata due to the seismic loads.
If it is a soft strata, then a raft foundation or pile foundation is necessary. But both pile foundation and raft foundation cannot counteract the effect of liquefaction. If the soil is found to be susceptible to liquefaction, then proper ground improvement methods should be followed before the construction of the foundation.
Various ground improvement techniques can be found here.
https://theconstructor.org/geotechnical/ground-improvement-techniques-soil-stabilization/1836/
See lessWhy helical reinforcement gives better strength than ordinary columns?
CB Sowmya
As per Is 456 - 2000, when using a helical reinforcement, we can consider an increase of 5% in the strength, Since helical reinforcements provide good ductility, it is suitable for earthquake prone regions where ductility is an important factor. To know more about helical reinforcements, https://theRead more
As per Is 456 – 2000, when using a helical reinforcement, we can consider an increase of 5% in the strength,
Since helical reinforcements provide good ductility, it is suitable for earthquake prone regions where ductility is an important factor.
To know more about helical reinforcements,
https://theconstructor.org/practical-guide/detailing-guide/types-stirrups-column/25740/
See lessWhat is the bearing capacity of soil? How can we calculate it?
CB Sowmya
With the previous answer, I would like to add the following. Bearing capacity plays a major role in the foundation design of a structure. Bearing capacity (kN/sq.m) is the maximum load that the soil can take per unit area without failure, displacement, or yielding. Bearing capacity depends on the soRead more
With the previous answer, I would like to add the following.
Bearing capacity plays a major role in the foundation design of a structure. Bearing capacity (kN/sq.m) is the maximum load that the soil can take per unit area without failure, displacement, or yielding. Bearing capacity depends on the soils structure, density, permeability, porosity, and shear strength. Mostly, based on the bearing capacity, we arrive at the type and dimensions on the footing,
The tests have already been included in the answer by Vivek Patel.
To know more about, bearing capacity of soils,
https://theconstructor.org/geotechnical/bearing-capacity-of-soil-calculation/11996/
See lessWhat is the moisture content limits in plastered walls before we take up the painting work?
CB Sowmya
The maximum moisture content is limited to 12% in plastered walls before painting or application of any coating.
The maximum moisture content is limited to 12% in plastered walls before painting or application of any coating.
See lessWhich is the widely used industry-standard software for Pavement design in India?
CB Sowmya
Various softwares used are listed below in no particular order: MX roads by Bently PaverXpress ANSYS AASHTOWare PAVERS IIT Pave
Various softwares used are listed below in no particular order:
- MX roads by Bently
- PaverXpress
- ANSYS
- AASHTOWare
- PAVERS
- IIT Pave
See lessWhat are the quick repair methods we should use for potholes in city roads which is one of the main causes accidents?
CB Sowmya
Bitumen road is the most deceiving structure. It has a low initial cost, but the maintenance cost that follows is very high. Sometimes, these maintenance costs would override the costs of a concrete paver. Potholes are not created overnight. It is a slow process. It occurs due to the water present bRead more
Bitumen road is the most deceiving structure. It has a low initial cost, but the maintenance cost that follows is very high. Sometimes, these maintenance costs would override the costs of a concrete paver.
Potholes are not created overnight. It is a slow process. It occurs due to the water present below the soil, which forms holes below the pavement, due to the continuous flow of traffic, the pavement breaks. This situation is aggravated when the traffic flow continues. This movement will pump out the underlying soil and the bitumen outside, causing a hole.
To know more about it, check https://theconstructor.org/transportation/types-failures-in-flexible-pavements-repair/16124/
The potholes can be repaired in two ways – Semi-permanent and Permanent.
Answering the question, The reason why the potholes keep occurring, again and again, is because of going for semi-permanent methods to repair them. Switching to permanent methods will solve the problem of accidents.
This includes cleaning the pothole thoroughly and removing the surrounding bitumen. Then another new layer of pavement is laid from scratch. This will prevent them from occurring again in the same place. Potholes can be avoided completely if the subsoil studies are intensified.
See less