• Skip to primary navigation
  • Skip to main content
  • Skip to primary sidebar
  • Skip to footer
Civil Sir

Civil Sir

A to Z Civil Guides

Search Here...


  • Brick
  • RCC
  • Tile
  • Cement
  • Concrete

RR Masonry (Random rubble masonry)

RR Masonry (Random rubble masonry) | RR masonry 1:6 ratio cement and sand calculation | RR masonry 1:5 ratio cement and sand calculation | RR masonry 1:4 ratio cement and sand calculation.

RR Masonry (Random rubble masonry)
RR Masonry (Random rubble masonry)

In RR (random rubble masonry), the rough, irregular and unequal size of stones are used to build the wall structures. The typical stones are arranged by irregular dressing without any layers in the construction works. Or the stones are arranged in courses of equal height by neatly dressing & hammering them. The stones of equal size are selected to build the outer face of the retaining wall & to maintain the layers.

Due to unequal layers of RR masonry, it is difficult to estimate amount of mortar, cement, sand and stones. However, the certain thumb rules are used in the estimation of stones, cement, sand and mortar for RR masonry works.

RR Masonry (Random rubble masonry)

The thumb rules for RR masonry are following:

1) the amount of stones required for the random rubble masonry is 1.25 times the total volume of the structure. For example, suppose, if the volume of the stones masonry wall is = 20 cubic feet, then you need the volume of the stone requires to build the wall is 1.25 × 20 cu ft. = 25 CFT.

2) The dry volume of the mortar required for the stones or RR masonry (random rubble masonry) structure will be 40% of the total volume of the RR masonry. For example, suppose, if the volume of the RR masonry wall is 20 CFT, the amount required dry volume of the mortar will be 20 × 40% = 8 CFT.

If your volume of RR masonry work is 1m3, then as per thumb rule you need about 1.25 m3 (1 × 1.25 = 1.25 m3) of stones and 0.4 m3 (1 × 40% = 0.4m3) of dry volume of mortar.

The typical amount of stones and dry volume of mortar required for 1 m3 (cubic meter) of RR masonry is about 1.25 m3 of stones and 0.4 m3 of dry volume of mortar. Thus, a typical 1m3 of RR masonry requires 1.25 m3 of stones and 0.4 m3 of dry volume of mortar.

The typical amount of stones and dry volume of mortar required for 1 cubic foot (CFT) of RR masonry is about 1.25 CFT of stones and 0.4 CFT of dry volume of mortar. Thus, a typical 1 CFT of RR masonry requires 1.25 CFT of stones and 0.4 CFT of dry volume of mortar.

◆You Can Follow me on Facebook and

Subscribe our Youtube Channel

RR masonry 1:6 ratio cement and sand calculation

If your volume of RR masonry work is 1m3, then as per thumb rule you need about 1.25 m3 (1 × 1.25 = 1.25 m3) of stones and 0.4 m3 (1 × 40% = 0.4m3) of dry volume of mortar.

Given ratio of cement to sand is 1:6, total proportion = 1+6 = 7, part of cement = 1/7, and parts of sand = 6/7. Sand density = 1600 kg/m3 and cement density = 1440 kg/m3.

Required cement quantity in kg = 1/7 × 0.4 × 1440 = 83 kg, cement amount in bags = 83/50 = 1.66 bags.

Required sand quantity in kg = 6/7 × 0.4 × 1600 = 550 kg, sand amount in CFT = 550/45 = 12 CFT.

RR masonry 1:6 ratio cement and sand calculation: with a mix ratio of 1:6, you required 1.66 bags of 50kg cement, 12 CFT of sand, 1.25 m3 of stones, 0.4 m3 of dry volume of mortar for 1 m3 of RR masonry.

RR masonry 1:5 ratio cement and sand calculation

If your volume of RR masonry work is 1m3, then as per thumb rule you need about 1.25 m3 (1 × 1.25 = 1.25 m3) of stones and 0.4 m3 (1 × 40% = 0.4m3) of dry volume of mortar.

Given ratio of cement to sand is 1:5, total proportion = 1+5 = 6, part of cement = 1/6, and parts of sand = 5/6. Sand density = 1600 kg/m3 and cement density = 1440 kg/m3.

Required cement quantity in kg = 1/6 × 0.4 × 1440 = 96 kg, cement amount in bags = 96/50 = approx 2 bags.

Required sand quantity in kg = 5/6 × 0.4 × 1600 = 534 kg, sand amount in CFT = 534/45 = approx 12 CFT.

RR masonry 1:5 ratio cement and sand calculation: with a mix ratio of 1:5, you required 2 bags of 50kg cement, 12 CFT of sand, 1.25 m3 of stones, 0.4 m3 of dry volume of mortar for 1 m3 of RR masonry.

RR masonry 1:4 ratio cement and sand calculation

If your volume of RR masonry work is 1m3, then as per thumb rule you need about 1.25 m3 (1 × 1.25 = 1.25 m3) of stones and 0.4 m3 (1 × 40% = 0.4m3) of dry volume of mortar.

Given ratio of cement to sand is 1:4, total proportion = 1+4 = 5, part of cement = 1/5, and parts of sand = 4/5. Sand density = 1600 kg/m3 and cement density = 1440 kg/m3.

Required cement quantity in kg = 1/5 × 0.4 × 1440 = 115 kg, cement amount in bags = 125/50 = approx 2.3 bags.

Required sand quantity in kg = 4/5 × 0.4 × 1600 = 512 kg, sand amount in CFT = 512/45 = approx 11 CFT.

RR masonry 1:4 ratio cement and sand calculation: with a mix ratio of 1:4, you required 2.3 bags of 50kg cement, 11 CFT of sand, 1.25 m3 of stones, 0.4 m3 of dry volume of mortar for 1 m3 of RR stones masonry.

RR masonry 1:8 ratio cement and sand calculation

If your volume of RR masonry work is 1m3, then as per thumb rule you need about 1.25 m3 (1 × 1.25 = 1.25 m3) of stones and 0.4 m3 (1 × 40% = 0.4m3) of dry volume of mortar.

Given ratio of cement to sand is 1:8, total proportion = 1+8 = 9, part of cement = 1/9, and parts of sand = 8/9. Sand density = 1600 kg/m3 and cement density = 1440 kg/m3.

Required cement quantity in kg = 1/9 × 0.4 × 1440 = 64 kg, cement amount in bags = 64/50 = approx 1.28 bags.

Required sand quantity in kg = 8/9 × 0.4 × 1600 = 570 kg, sand amount in CFT = 570/45 = approx 12.6 CFT.

RR masonry 1:8 ratio cement and sand calculation: with a mix ratio of 1:8, you required 1.28 bags of 50kg cement, 12.6 CFT of sand, 1.25 m3 of stones, 0.4 m3 of dry volume of mortar for 1 m3 of RR stones masonry.

How much cement required for 1000 sq ft house

How much sand do you mix with cement

What is the quantity of stone required for 10 m3 of rubble masonry?

With a standard mix ratio of 1:4, you need about 23 bags of 50kg cement, 110 CFT of sand, 12.5 m3 of stones, 40 m3 of dry volume of mortar for 10 m3 (cubic meter) of RR stones masonry.

Conclusions:-

In RR masonry (random rubble masonry), the rough, irregular and unequal size of stones are used to build the wall structures.

More Important Posts:―

  1. How many studs do i need for a 10×12 shed
  2. Soil structure definition, types, grade & clay mineralogy
  3. Rafter size for 10′, 12′, 15′, 16′, 18′, 20′ & 24 foot span
  4. Concrete calculator to yards – How much concrete do you need
  5. How much does it cost to tile a 1200 square foot house

Primary Sidebar

Categories

  • AAC block (19)
  • Asphalt (1)
  • beam (9)
  • board (2)
  • Brick (61)
  • Cement (106)
  • Cement test types (2)
  • Compressive strength (10)
  • Concrete (297)
  • Cubic feet (1)
  • deck (6)
  • door (1)
  • drywall (20)
  • feet (1)
  • flooring (17)
  • gallon (1)
  • garage (2)
  • garage door (2)
  • gravel (8)
  • joists (8)
  • Land measurement (20)
  • mulch (2)
  • Paint/ putty calculator (21)
  • plywood (3)
  • Rate Analysis for civil work (2)
  • RCC (176)
  • Road/ highway (13)
  • Roof slab (41)
  • sand (2)
  • siding (17)
  • soil (2)
  • Soil mechanic (10)
  • span (9)
  • stairs (1)
  • steel (3)
  • storey (7)
  • Tile (32)
  • Uncategorized (874)
  • wallpaper (5)
  • Weight of Steel (50)
  • सिविल नॉलेज इन हिंदी (21)

Recent Posts

  • The Evolution of Smart Homes: Integrating Technology with Design
  • How many blocks needed to build a 1, 2, 3 & 4 bedroom house
  • Streamlining Construction: The New Age of Brick Production
  • Best concrete mix for slab, patio, sidewalk, fence posts and footing

Popular Post

The Evolution of Smart Homes: Integrating Technology with…

How many blocks needed to build a 1, 2, 3 & 4 bedroom house

How many blocks needed to build a 1, 2, 3 & 4 bedroom…

Streamlining Construction The New Age of Brick Production

Streamlining Construction: The New Age of Brick Production…

Best concrete mix for slab, patio, sidewalk, fence posts and footing

Best concrete mix for slab, patio, sidewalk, fence posts and…

TMT bar weight (8mm, 10mm, 12mm, 16mm & 20mm)

TMT bar weight (8mm, 10mm, 12mm, 16mm & 20mm)…

5 inch brick wall calculation

5 inch brick wall calculation | brickwork and brick estimate…

Footer

About Us

At CivilSir, we share all the information related to civil engineering. So if you are a civil engineering student this is the best platform where you can improve your knowledge.

Newsletter

To get update of latest post signup below by giving you email address.

Follow Us

DMCA.com Protection Status

Copyright © 2023 CivilSir About Us Guest PostContact usPrivacy policySitemap