What is WMM layer?

Wet Mix Macadam(WMM) work includes laying and compacting clean, crushed, graded aggregate and granular material, premixed with water, to a dense mass on a prepared GSB layer or existing pavement as per the requirement of the project.

What is the function of WMM?

WMM maintains the priority of audio, video and voice, over other applications which are less time critical. Using QoS (Quality of Service) Wi-Fi Multi-Media (WMM) ensures that the applications that require better throughput and performance,are inserted in queues with higher priority.

What do you mean by WMM?

What Does Wi-Fi Multimedia (WMM) Mean? Wi-Fi Multimedia (WMM) is a subset of the IEEE 802.11e standard for wireless LAN applications. It is used to define and optimize Wi-Fi signal quality and performance by prioritizing Wi-Fi network traffic when multiple concurrent applications compete for network resources.

What is WMM and GSB?

WMM = Wet Mix Macadam (40 mm down aggregates, mix design required) GSB = Granular Sub Base (63 - 40 mm aggregate or 70mm down aggregates) SR = Soil Replacement (preferably quary materials)

What is WBM & WMM?

WBM(Water Bound Macadam) conventional method and WMM(Wet Mix Macadam) modern technology- are base course layers for Pavement/Road design. In case of WBM stone aggregates and binders are overlaid on one another at the time of construction.

Wet Mix Macadem Construction in Highway | WMM Construction Technical Specification | Video No.6

What is GSB road?

Granular Sub-base (GSB) consists of laying and compacting well graded material on prepared sub-grade in accordance with the specifications.: GSB layer is intermediate layer in between Sub-grade and Wet mix macadam. GSB layer is laid in roads and higway works due to its properties .

What is the size of GSB?

GSB :- Granular sub base or GSB is a typical layer adopted in highway construction, which is laid above the subgrade and below the crust materials. Naturally available material consisting of various grades may be used for GSB, the largest grain size up to 65mm.

What is the thickness of WMM?

Wet Mixed Macadam (WMM) Base thickness of single compacted should not be less than 75 mm. WMM shall be laid in layers of 75mm or 100mm as per thickness.

What is WBM layer?

The full form of WBM is Water Bound Macadam. It is the layer of road constructed from broken stone aggregates bound together by stone dust or screening material and water applied during construction and compacted by a heavy smoothed wheel roller.

What is minimum thickness of GSB?

➢The recommended minimum thickness of granular base is 225 mm for traffic upto 2 msa and 250 mm for traffic exceeding 2 msa.

What is wet mix concrete?

Wet concrete is the liquid mixture of cement, sand, gravel and water. As soon as wet concrete has cured, it is called just concrete. Depending of what you will use your concrete for, e.g. building a brick wall or pour a concrete foundation, the mixture ratio of your ingredients will differ.

What is WMM setting in router?

WMM (Wi-Fi multimedia) prioritizes network traffic to improve the performance of a variety of network applications, such as video and voice. All routers that support Wi-Fi 4 (802.11n) or later should have WMM enabled by default. Disabling WMM can affect the performance and reliability of devices on the network.

Why is GSB used?

INTORDUCTION The Granular Sub Base (GSB) layers are used in the flexible pavements to provide a stress-transmitting medium to spread the surface wheel load to a large area so as to prevent the shear and consolidation deformations.

What is DBM in road work?

Dense Bituminous Macadam (DBM) is a binder course used for roads with more number of heavy commercial vehicles and a close-graded premix material having a voids content of 5-10 per cent.

What is prime coat?

A prime coat is the application of a suitable bituminous binder applied to a non-bituminous granular base as a preliminary treatment before the application of a bituminous surfacing. The purpose of this research is to establish practical applications of successful prime coats to replace cutback asphalt.

What is meant by BT road?

Bitumen is a black, oily and viscous material that is a naturally occurring organic by-product of decomposed organic materials. It is a common binder that is mixed with and glued together aggregates to make asphalt and its primary use is found in road construction.

What is the size of WMM?

Stone aggregates used in WBM is larger in size which varies from 90 mm to 20 mm depending upon the grade but in case of the WMM size varies from 4.75 mm to 20 mm.

How is Wmm prepared?

Wet Mix Macadam consist of laying spreading and compacting of clean, crushed, well-graded granular materials on a prepared and approved Granular sub-Base. The material is well mixed with water and rolled to a dense mass.

What is thickness of WBM?

The WBM Course shall be constructed in layers such that thickness of each compacted layer is not more than 100 mm for grading 1. The compacted thickness of layer shall be 75 mm for grading 2 and grading 3.

What is CBR in road construction?

The California Bearing Ratio (CBR) is a measure of the strength of the subgrade of a road or other paved area, and of the materials used in its construction.

What is maximum dry density of GSB?

The maximum dry density of Granular Sub Base used in Road Construction must be 2100 Kg/Cum. The maximum dry density of Wet Mix Macadam used in Road Construction must be 2230 Kg/Cum.

What is PQC pavement?

Pavement Quality Concrete (PQC) is normally employed for providing a strong surface of rigid pavements. PQC is also used for construction of runways in airports in order to distribute the heavy impact load from wheel to sub- grade layers [1].

What is G1 G2 G3 in road?

G1, G2, and G3 are the aggregate gradations ranging from the most porous to the least porous, respectively. Properties of SFP include its volumetric properties, quality, and durability.

What is DBM and BC in road construction?

They are: Dense Bitumen Macadam (DBM) Bituminous Concrete(BC)