00442Controlled Low Strength Materials

00442.00 Scope - This Work consists of furnishing and placing controlled low -strength

materials (CLSM).

00442.01 Definition - Controlled low -strength material is highly flowable lean concrete mix; a mixture

of fly ash, cement, F ine Aggregate s, water and admixtures, i f necessary. Materials

00442.10 Materials - Furnish Material s meeting the following requirements:

Admixtures ................................................................................................ 02040 Fly Ash ................................................................................................. 02030.10 Portland Cement .................................................................................. 02010.10

00442.11 Fine Aggregates - Furnish Fine Aggregate s that are commercial quality concrete Sand.

00442.12 Proportioning of CLSM Mixture - Furnish the following, to the Engineer, prior to using

any CLSM on the Project: • Written certification of proposed CLSM proportions and compressive strength. • 28-Day cylinder reports from a trial CLSM batch based on above certification. Include evidence that compressive strength requirements for specific applications are met.

00442.13 Compressive Strength - CLSM shall attain a 28-Day compressive strength of

100 psi - 200 psi.

00442.14 Acceptance - Acceptance will be based on the Engineer's review and approval of written

certification and trial batch cylinder reports as required by 00442.12. Measurement

00442.80 Measurement - No measurement of quantities will be made for C LSM.

Payment

00442.90 Payment - No separate or additional payment will be made for CLSM. Payment will be

included in payment made for the appropriate items under which this Work is required.