Standardized Prescribed Concrete (SPC)| BS 8500-2

SPC or standard mixes of concrete are concrete that are defined list of concrete within BS 8500, that mentions the prescribed quantity of materials as per the British Standard.


SPC is usually mixed at the .site or obtained from a supplier with no quality standards.

The strength guaranteed by these mixes is, fair as they are the basic concrete mixes, as they are designed based on the assumed values contained within BS 8500. The types of SPC, their strength  , and their applications are mentioned in table below.




Type Of SPC

Description

Strength 28 Days (N/Mm2)

Applications

ST1

Wet Lean Mix Concrete

7.5

Commercial & Domestic Projects – Structural & Non-Structural Applications

Kerb bedding

Backing

Blinding

Haunching

Drainage works

 

ST2

Versatile Mix

10

General and Housing Application – Ideal for un-reinforced foundations

un-reinforced strip footings

trench-fill foundations

some agricultural applications

drainage works

blinding house floors

pad foundations

non-structural mass concrete in non-aggressive (DC-1) ground conditions

footings for fence posts

infilling around manholes

small bases for external furniture, such as patios

mass concrete fill

 

ST3

Light Duty

15

Domestic applications & foundations

shed and workshop bases

foundations for large walls, garages, houses, and extensions

paving for patios

unreinforced bases and oversites for conservatories, garages, sheds, and greenhouses

 

ST4

Light Traffic

20

Domestic, agricultural, and industrial applications

garage floors (not designed as suspended and not reinforced)

shed and workshop bases

internal floor slabs (containing no embedded metal)

drain/channel bedding

benching to chambers

 

ST5

Light Traffic

25

domestic, commercial, and agricultural application

agricultural equipment stores

foundations for environmental barrier posts and planted lighting columns

foundations for traffic signposts

house and garage ground floor slabs fully or nominally reinforced, either ground bearing, suspended or over sub-floor voids

 


Mix Proportions for Standardized Prescribed Concrete

The mix proportions for standardized concrete as BS 8500-2: 2002 as per Table-10 are given below.




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