• How Much Base Material Do I Need for ..

    04 06 2013  Another way of figuring this out is that 1 yard of crushed stone will get you 80 square feet at 4 inches thick. Figuring out how much sand that you will need is done much the same way. Since you only need a 1 inch bed of sand to set your pavers on just take your square footage measurement from the stone and this time multiply by .00309.

    Get Price
  • 3 Reasons Why It s Important To Use Crushed Stone Under

    28 04 2014  Concrete may seem strong but after many years elements and pressure it will eventually crack. So in order to make your concrete last as long as your money that went into it adding a layer of crushed stone under a slab of concrete will increase the life of your investment. Here are 3 reasons why a layer of crushed stone is important to the life of your concrete

    Get Price
  • Basic guide to stone foundations

    Natural stone has been used for thousands of years until as recently as about the 1940s. Its main attributes are high compressive strength incredible durability and local availability. The stone foundations in the Ottawa area are all built the

    Get Price
  • How much base is required for paving stone ..

    In clay areas you should consider a minimum base of 8 inches 20 cm of gravel for pedestrian use areas and a minimum of 12 inches 30 cm for vehicular applications such as driveways. 3. Load bearing capacity. This is an

    Get Price
  • AASHTO Pavement Thickness Design Guide

    Crushed Graded Stone Base 0.14 6 Macadam Stone Base 0.12 6 Portland Cement Concrete Base New 0.50 Old Portland Cement Concrete 0.40 Crack and Seated PCC 0.25 0.30 Rubblized PCC 0.20 Cold in Place Recycled 0.22 0.27

    Get Price
  • Sub bases

    The sub base layer is often the main load bearing layer of a pavement. It is designed to evenly spread the load of the paving and any traffic thereon to the sub grade below. A well constructed sub base will aid drainage and prevent settlement and channelisationthe phenomenon common on cheap installations of block paving where two ruts develop in the paving.

    Get Price
  • Different Types Of Aggregate And Their Uses

    Different types of Crushed concrete Type 1 Crushed Concrete50mm down to dust. Best used as a sub base for roads underneath blocks as well as layering in between concrete or tarmac and as a hard core for projects such as car parks. 6F2 Type 3 Crushed Concrete0 63mm reduced fines Oversized Clean Crushed Concrete75mm 100mm no fines

    Get Price
  • SAFE BEARING CAPACITY VALUES OF DIFFERENT SOILS ROCKS

    22 09 2015  The safe bearing capacity of soil should be determined on the basis of soil test data or by performing some field test such as Standard penetration test or Plate load test etc. However in the absence of soil test data the values of safe bearing capacity S.B.C as given in the following table may be used as a guide for preliminary analysis. Sl.

    Get Price
  • Subgrades and Subbases for Slabs

    22 11 2017  We use 6 to 8 inches of crusher run says Steve Lloyd Lloyd Concrete Services Forest Va. It includes lots of fines and we compact it to 98 . We will not use #57 stone that’s like trying to place a slab on marbles. I’ll turn down any job that specifies #57 stone as a subbase. Reasons to Avoid Placing a Sand Layer

    Get Price
  • Inspection Requirements

    Determine if the required base material is four inches thick and consists of clean graded sand gravel crushed stone or crushed slag. Determine if a vapor retarder is provided and that it is a 6 mil visqueen vapor retarder with joints lapped not less than six

    Get Price
  • How much stone will i need

    23 02 2010  You have to calculate the volume of stone you want to use then convert it into weight. Different Stone Grades have different conversions as their densities are not the same. Typically crushed/washed stone will convert at 1.6 1.8 tons per yard. Crusher Run or DGA will convert more like 1.9 2.1 tons per yard.

    Get Price
  • HOW MUCH CLEARANCE DO YOUR BEARINGS NEED

    differ slightly in thickness within allowed tolerance limits. For these reasons bearing clearances are specified as vertical clearance and must be measured at 90 degrees to the split line. The best method of measurement is with a dial bore gage that measures the bearing inside iameter when the bearings are installed at the

    Get Price
  • Slabs On Ground Slab Thickness and Base Tolerances

    13 08 2015  Slabs thicker than the specified thickness will cost more money. Thicker slabs increase concrete costs. For every 1/8 inch the grade is low the volume of concrete increases about 0.39 cubic yards

    Get Price
  • Design Construction of Heavy Duty Pavements

    thickness was considered as a major contributor to mixture strength particularly at slow loading rates Davis 1988 . However more recent research and experience has shown that aggregate gradation is more impor tant than aggregate size in ensuring stone on stone contact of the larger aggregate particles.

    Get Price
  • Piles Capacity

    5 8 10 12 14 17 21 25 30 38 43 60 72 Ultimate unit tip resistance qb can be also calculated using the SPT number of the bearing stratum at the pile toe. This value should be an average representing 3B thickness beneath the pile toe. q b=57.5⋅N SPT q b in kPa q b=8.33⋅N SPT q b in psi 10 General notes for tip resistance in granular

    Get Price
  • cement thickness verses machine weight

    11 03 2005  Minimum 3/8 inch rebar 1/2 inch much better. A 1 foot grid pattern is most common. I would also put this grid on the top of the slab as well. The common cover of the bar is 1.5 inch minimun. I am thinking of a 6 inch slab minimum. On a 4 inch slab the bar will be crack control for the most part.

    Get Price
  • How much weight can 4 inch concrete slab hold

    16 05 2017  I want to construct 4 inch thick and 9 foot tall wall above the slab that is 4 inch thick to extend my room. Composition of concrete used in slab 1 2 3 ratio of opc cement sand crushed stone. Reinforced by 8 mm rebar. Length 17 foot Width 2 foot I want to know if it can hold the wall with 6 by 5 and 4 by 5 foot two wooden windows.

    Get Price
  • AASHTO #57 Stone Specs

    stone should have it’s individual stone facets properly oriented using a plate compactor jumping jack or other vibratory compaction devices. Using compaction equipment #57 stone will typically compact about one inch in vertical height which is equivalent to about 8 settlement. This can be visually observed and verified.

    Get Price
  • 7 Different Crushed Stone Sizes and Their Applications

    27 07 2020  #8 These stones are between 3/8 and 1/2 inch long. It is the most common stone used for concrete mixes. #10 Crushed stone #10 is known as screenings or dust. Most use this material to create pavers and concrete blocks. Specialty Crushed Stone #57 This category refers to a stone that is about 3/4 inch long.

    Get Price
  • Quizlet 2 Flashcards

    Quizlet 2. The top surface of the passenger car of a train moving at a velocity of 70 km/h is 2.8 m wide and 8 m long. The top surface is absorbing solar radiation at a rate of 200 \mat W / \mat m 2 and the temperature of the ambient air is 30 \circ \mat C . Assuming the roof of the car to be perfectly insulated and the

    Get Price
  • What Is the Load Bearing Capacity of Different Sized

    The material used in the construction of a concrete block affects its load bearing capacity. For instance a 10 by 8 by 16 inch concrete block made with stone dust may support more weight than a 15 by 12 by 24 inch block made with sand because stone dust exhibits greater weight and strength than sand.

    Get Price
  • Construction Specification 423 Earthfill and Gravel Fill

    thickness in Maximum rock size in C1 Tamping roller sheepsfoot 100 9 6 C2 Pneumatic rubber tire Roller 80 9 6 C3 Loaded earth moving equipment 25 8 5 C4 Wheel type tractor 100 hp 10 6 4 C5 Track type factor 8 6 4 The compaction method shall be .

    Get Price
  • Precast Concrete Foundation FAQs

    The depth of the crushed stone footing is determined by considering the allowable soil bearing capacity on the building site and cross referencing that with the combined footing load per lineal foot using a table in the SWA Builder Guideline Booklet MAN 42 9000 BGB US Version or MAN 42 9027 BGB Canadian Edition .

    Get Price
  • Converting CBR to Bearing Capacity

    08 07 2003  Well strictly speaking it is a percentage. You re comparing the resistance of a given material to the resistance of an ideal crushed stone that will support 1 000 psi at 0.1 inch deflection. Read the procedurethe final step is to multiply by 100. CBRs don t exceed 100because they can t exceed the ideal material.

    Get Price
  • Asphalt Calculator

    Use this asphalt calculator that supports you to measure out the amount of asphalt you’ll need to complete any project. As asphalt pavement material is very precisely engineered therefore it will let you calculate the total amount of crushed stone thickness dirt that needs to be removed area volume and Total cost of asphalt according to weight.

    Get Price
  • Retaining Wall Challenges The Stone Trust

    01 06 2019  An 8″ thick wall does not have the needed mass to retain soil at that height even if the drainage was excellent 8″ is inadequate in a case such as this. A 39″ tall retaining wall should generally have a base with of 26″ to 30″ or more. An engineer will tell you that is an excessive in terms of mass and that is true.

    Get Price
  • Suggested Compaction Standards for Crushed Aggregate

    Suggested Compaction Standards for Crushed Aggregate Materials Based on Experimental Field Rolling F.P. NICHOLS Jr. and HAL D. JAMES respectively. Highway Research Engineer and Highway Engineer Trainee ia Council of Highway Investigation and Research Charlottesville This paper describes field studies undertaken in 1960 and 1961 for the

    Get Price
  • Gravel Calculator

    Quarry process also called crusher run is the combination of stone dust crushed stone and trap rock. Stones usually ¾ inch or less in size. Often used in the construction of driveways road base patios and walkways as base or sub base.

    Get Price
  • Chapter 4 Foundations Flashcards

    8 inches . Answer C. 2015 IRC R401.3 Drainage Section R401 General Chapter 4 flat concrete foundation wall of nominal 10 inch thickness subjected to 8 feet of unbalanced backfill of soil class GM gravel or crushed stone drains

    Get Price
  • Quiz 4 Flashcards by MomOneMoreGame S

    Study Quiz 4 flashcards from MomOneMoreGame S s Anoka Ramsey Community College class online or in Brainscape s iPhone or Android app. Learn faster with spaced repetition.

    Get Price
  • SPECIFICATION P–208

    Aggregates consist of both fine and coarse fragments of crushed stone or crushed gravel mixed or blended with sand Stone Crushed Gravel Crushed Stone 1 1/2 Inch 37.0 mm 1 Inch 25.0 mm 3/4 Inch 19.0 mm Construct base course in layers not less than 3 inches 75 mm nor more than 6 inches 150 mm compacted thickness. Aggregate in

    Get Price
  • How to Check for Bad Main Bearings

    Loosen the main bearing cap bolts with a socket and pull the bearing cap off. Use the kit gauge to measure the crushed thickness of the plastigauge. Refer to your owner s manual for the proper thickness allowed indicated in thouhs of a inch. Worn main bearings will show a lower than normal thickness reading and must be replaced.

    Get Price
  • California Bearing Ratio CBR Test of Subgrade Soil

    C.B.R. may be defined as the ratio of the test load required to force a cylindrical plunger of 19.355 cm2 cross sectional area into a soil mass at the rate of 0.25 cm/min to the load required for corresponding penetration of the plunger into a standard sample of crushed stone the later load is known as the standard load.

    Get Price