Mot Type 1 limestone is sized from 40mm down to dust and is mainly used as a bulk fill, a levelling material and as a sub-base for paths, ponds, drives, sheds, patios and construction jobs.
The Different Types Of Aggregate. The categories of aggregates include gravel, sand, recycled concrete, slag, topsoil, ballast, Type 1 MOT, and geosynthetic aggregates (synthetic products commonly used in civil engineering projects used to stabilise terrain).
Similarly, what is type1 material? Also known as GSB TYPE 1 or MOT TYPE 1 – this is a granular material with a maximum permitted top size of 63mm, graded down to dust. Type 1 must be of a crushed nature to provide a stable sub-base for road surfaces and pathways. Both primary and recycled constituents can be used to produce a Type 1 sub-base.
Herein, what is Type 1 and Type 2 aggregate?
Type 2 crushed concrete is a standard sub-base material and used for roads such as pot-hole filling-in but like Type 1 it can be used for other things like driveways, backfill material, patios, tracks and other paths. It is crushed stone which is less than 40mm in size down to dust with no specified grading.
What is type1 gravel?
Ballast, gravel and hardcore MOT Type 1 (hardcore) is crushed carboniferous limestone, used to create a hardcore base under patios, paving, driveways and artificial grass. It can also be used as a filling product.
Which type of aggregate gives maximum strength?
To obtain high strength concrete, coarse aggregate size is usually held to a maximum size of 19 mm, but additional cement is required for the additional surface area. The fine aggregate can generally contain less material passing 300 um and 150 um sieve because of the higher cement content.
What are the sizes of aggregate?
SIZES OF AGGREGATE Stone Dust: 0.5mm – 5mm. Coarse Sand: 0.5mm – 2mm. Medium Sand: 0.25mm – 0.5mm. Fine Sand: 0.06mm – 0.25mm. Silt: 0.002mm – 0.06mm. Clay: < 0.002mm. Fine gravel: 4mm – 8mm. Medium gravel: 8mm – 16mm.
What are the sources of aggregate?
Sources for these basic materials can be grouped into three main areas: Mining of mineral aggregate deposits, including sand, gravel, and stone; use of waste slag from the manufacture of iron and steel; and recycling of concrete, which is itself chiefly manufactured from mineral aggregates.
What can make concrete 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.
What is a Type 1 Sub Base?
MOT Type 1 Sub-Base. Mot Type 1 limestone is sized from 40mm down to dust and is mainly used as a bulk fill, a levelling material and as a sub-base for paths, ponds, drives, sheds, patios and construction jobs.
What is the maximum size of fine aggregate?
Typically, coarse aggregate sizes are larger than 4.75 mm (5 mm in British code), while fine aggregates form the portion below 4.75 mm. A maximum size up to 40 mm is used for coarse aggregate in most structural applications, while for mass concreting purposes such as dams, sizes up to 150 mm may be used.
What is the difference between concrete and aggregate?
As nouns the difference between aggregate and concrete is that aggregate is a mass, assemblage, or sum of particulars; something consisting of elements but considered as a whole while concrete is a building material created by mixing portland cement, water, and aggregate including gravel and sand.
How do you determine aggregate quality?
Field Tests for Aggregate Surface Moisture Content & Absorption. The surface moisture in the aggregate, influences the water cement ratio, strength and durability of the mix. Silt Content Test for Sand. Silt content test. Bulking of Sand. Sieve Analysis. Fineness Modulus.
What is the difference between 6f2 and Type 1?
Type 1 recycled aggregates – in which Mone Bros specialise in – are built up of 40mm to dust which contains both concrete and tarmac. Meanwhile, type 6F1 recycled aggregates are finer capping layers used in the same applications as other aggregates, but with a finer grading.
How much Type 1 do I need for a patio?
MOT Type 1 (DTp1) forms the sub-base for all paving projects, for both patio paving and driveway paving. It is usual to lay MOT Type 1 at a compacted depth of 100mm for most patio projects and at a compacted depth of 150mm for most domestic driveways. Compaction should be achieved using a wacka plate.
Can I use gravel as a sub base?
Gravel is fine as a sub-base providing its compacted well. If you do use gravel it needs to be restrained on all sides to stop it spreading. You would also need to lay the slabs on mortar as sand would simply drain away.
What is Type 3 sub base?
Consists of: Pure crushed granite or limestone. This is a 40mm product that has been screened to create a reduced fines aggregate not zero fines. MOT Type 3 can be made from Granite, Limestone or clean Crushed Concrete and has become increasingly popular as a permeable sub-base aggregate.
What does Type 1 MOT mean?
MOT Type 1 refers to the stone size,composition and compressive strength conforming to the requirements of the ministry of transport for a compacted sub – base.
What is 6f2?
6F2/6F5. 6F5 is an unbound, coarse recycled aggregate made from crushed hardcore and concrete and graded from 75mm down to dust. 6F2 can be used as bulk fill to build up levels, as a temporary hard standing, for firming up soft or wet ground or for use as a layer below Type 1 crushed/primary.