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Checklist A6

To demonstrate that the local best practice guidance for defining "granular fill and capping as a high grade use" is appropriate, the local guidance or standard must cover the requirements set out in Table 69 and Table 70. NOTE: The extent and scope of this local guidance or standards will be checked by BRE waste experts to ensure that the overall effect is equivalent to the BREEAM requirements.

Table 69 Sampling and testing of processed or recovered product

Property description	Basic principals
General description
Aggregate composition (including organics)	Visual sorting of the plus 8mm fraction.
Particle size and grading	Size distribution of particles in an aggregate sample determined using test sieves (sieves meeting a national or equivalent standard for test sieves).
Fines content	Percentage of aggregate by mass passing a 0.063mm sieve.
Particle shape	Determination of the proportion (by mass) of flat or elongated particles.

Table 70 Requirement for additional testing of processed or recovered aggregate products by end use (note that tests and properties given in brackets are only required where the test is relevant to the end application or the local climate or is considered otherwise essential)

Test or property	Basic principle
(Surface abrasion resistance)	Determination through testing of the ability of aggregate particles to retain their shape characteristics under construction conditions and traffic (when relevant to the end use).
(Alkali silica reaction)	Aggregate reactivity in concrete (RILEM AAR3 or equivalent method) where there is concern about the possibility that the aggregate is alkali reactive.
(Resistance to freezing and thawing)	Resistance to fragmentation due to freezing and thawing action. Accelerated freeze-thaw test, magnesium sulfate soundness value or equivalent method.
(Polishing resistance)	Susceptibility of an aggregate to polishing (resistance to smoothing or loss of surface friction) when relevant to end use.
Bulk density	Determination of the loosely compacted bulk density of oven dry aggregate.
(Bearing capacity)	Determination of strength or bearing capacity of compacted aggregate or soil. Relevant to use of unbound aggregates in building or road foundations.
(Chlorides)	Determination of water soluble chloride content (relevant to use in concrete or mortar).
Evidence that there is no release of dangerous substances	In particular emission of radioactivity, release of heavy metals, release of polyaromatic hydrocarbons. Evidence to be provided when required and in case of doubt.
Water solubility	Water solubility of aggregate (percentage by mass).
(Organic contamination)	Relevant to use in mortar or concrete. Determination of constituents affecting the setting and hardening of concrete; presence of lightweight organic contaminators.
Particle density	Specific gravity or relative density of aggregate.
(Plasticity of fines)	A high proportion of plastic fines may be detrimental in asphalt or road construction. Testing may not be necessary where the total fines content of the aggregate does not exceed an agreed value which has been determined from local satisfactory use. Where the amount of fines may be considered plastic or harmful, apply one of the following or other equivalent method: (a) sand equivalent value; (b) plasticity index; or (c) methylene blue value.
(Resistance to fragmentation or impact)	Test to assess resistance of aggregate particles to degradation under impact.
(Resistance to heat or thermal shock)	Relevant to application of aggregate in asphalt or bitumen. Change in physical properties of aggregates subjected to 700°C environment.
Sulfates and sulphides	When required, determination of acid soluble sulfate or total sulfur.
Water absorption	Increase in mass of a sample of oven dried aggregate due to the penetration of water into the water accessible voids.