0
WBM (Water Bound Macadam) and WMM (Wet Mix Macadam) are used for Road construction in Base course layer. WMM is a new technology. difference between WBM and WMM can be summarized as below:
- Stone aggregate used in WBM is larger in size compared to WMM. In case of WBM its size varies between 45 mm to 90 mm depending upon the grade while in case of WMM aggregate size varies between 4.75 mm to 20 mm
- In case of WBM stone aggregate, screening material and binders are overlaid one after another respectively at the time of construction. But in case of WMM, aggregate and binding materials are premixed in a batching plant or concrete mixing machine and then brought to site for overlaying and rolling.
- Materials used in WBM are stone aggregate, screening material (Kankar or murrum or smaller stone aggregate for filling up the voids ) and/or binding material (stone dust or Quary dust of PI not less than 6). materials used in WMM are Stone aggregate and binders (Stone dust or Quary dust of PI not less than 6)
- Quantity of WBM is generally measured in Cubic Meter while quantity of WMM is measured in Square Meter.
Add your answer:
Earn +20 pts
What is the difference between wbm and wmm?
WBM (Water Bound Macadam) and WMM (Wet Mix Macadam) are used for Road construction in Base course layer. WMM is a new technology. difference between WBM and WMM can be summarized as below:Stone aggregate used in WBM is larger in size compared to WMM. In case of WBM its size varies between 45 mm to 90 mm depending upon the grade while in case of WMM aggregate size varies between 4.75 mm to 20 mmIn case of WBM stone aggregate, screening material and binders are overlaid one after another respectively at the time of construction. But in case of WMM, aggregate and binding materials are premixed in a batching plant or concrete mixing machine and then brought to site for overlaying and rolling.Materials used in WBM are stone aggregate, screening material (Kankar or murrum or smaller stone aggregate for filling up the voids ) and/or binding material (stone dust or Quary dust of PI not less than 6). materials used in WMM are Stone aggregate and binders (Stone dust or Quary dust of PI not less than 6)Quantity of WBM is generally measured in Cubic Meter while quantity of WMM is measured in Square Meter.WMM HAS MANY ADVANTAGES OVER WBM CONSTRUCTION1. SUPERIOR GRADATION OF AGGREGATES2.FASTER RATE OF CONSTRUCTION3.HIGHER STANDARD OF DENSIFICATION4.LESS CONSUMPTION OF WATER5. STRICTER STANDARD OF QUALITY ACHIEVABLE
What is wmm road?
For construction and repairing of National Highways up to the stage of laying of bitumen, water bound macadam (WBM) would be replaced by wet mix macadam (WMM) . Although WMM costs more, roads paved with WMM have greater quality. Moreover, black-topping can be done soon after laying WMM unlike WBM, said an official source. Waiting for WBM layer to dry up and solidify often takes days and causes much dusting of the road thereby hampering traffic. However, a road laid with WMM can be opened to traffic immediately after. According to procedures of laying WBM, stone types known as IRC (Indian Red Congress) grade I, II and III should be used. But in Manipur only IRC grade II and IRC grade III are used. These three grades of stones should be laid out layer above layer before covering it with earth. Then the layer is soaked with water before running it over by roller to solidify the road surface. It takes around a month for such a road surface to dry up before black-topping can be done. In WMM method, stones, binding material and water are mixed proportionately and the mixture is laid out at one time. Such road once run over by roller can be opened to traffic. Bitumen can also laid immediately after, said the source. Some states have already adopted WMM method since a few years back. As roads laid with WMM have greater quality, the same method will be applied while repairing Moreh-Pallel sector and North AOC-Maram sector of NH 39 on trial basis. The Ministry of Shipping, Surface Transport and Highways has also instructed the State Government to use WMM in place of WBM. Subsequently, work orders issued for repairing different segments of NH 39 specified use of WMM.
What is the Difference between GSB and WMM?
WMM mix is produced by Well controlled Pug Mill type plant and the WMM material is Designed product and purpose of WMM is to resist water to reach upper DBM or DGBM layer.
What is the procedure for constructing of WMM roads?
The first procedure for constructing the WMM roads is the removal of the geographical obstacles. The earth and the rock are usually also removed through digging or the use of explosives.
What is unit weight of wmm?
The unit weight of Wet Mix Macadam (WMM) typically ranges between 2.2 to 2.4 g/cm3. It can vary depending on the mix design and materials used in the construction of the WMM layer. The unit weight is an important parameter in determining the compacted density and strength of the WMM layer.
Does WMM stand for Windows Movie Maker?
Yes. WMM stands for Windows Movie Maker.
How do you add chroma key to wmm?
Mckenzie
What the density of wmm?
The exact density of WMM (Wet Mix Macadam) can vary depending on factors such as aggregate size, moisture content, and specific composition. However, a typical range for the density of WMM is around 1.8 to 2.2 tonnes per cubic meter.
What are the functions of wet mix macadam?
wet mix mecadam is a base layer of DBM bonding b/w WMM and DBM is too good and we can compact the WMM fully..........
What is the full form of WMM that is used in the controllers?
wireless mobile machine
Why windows movie maker does not play storyboard?
Your WMM should play in both the Storyboard and Time-line views.You might try repairing your WMM ( if it doesn't play in Storyboard) via Windows Automatic Updates.
What is the acronym for Windows Movie Maker?
WMM is the acronym for Windows Movie Maker.
