Art. 1019.01 Controlled Low-Strength Material (CLSM) SECTION 1019. Controlled Low-Strength Material (CLSM)
1019.01 Description. This work shall consist of the materials, proportioning,
mixing, and transporting of controlled low-strength material (CLSM).
1019.02 Materials. Materials shall be according to the following.
Item Article/Section
a.Portland Cement, Type I ......................................................................... 1001
b.Water ...................................................................................................... 1002
c.Fine Aggregate for Controlled Low-Strength Material (CLSM) ........... 1003.06
d.Fly Ash .................................................................................................... 1010
e.Admixtures (Note 1) Note 1. The air-entraining admixture may be in powder or liquid form. Prior to approval, a CLSM air-entraining admixture will be evaluated in the laboratory by the Engineer. The admixture shall be able to meet the air content requirements of Mix 2. The Department will maintain a qualified product list.
1019.03 Equipment. Equipment shall be according to the following.
Item Article/Section
a.Concrete Mixers ................................................................................. 1103.01
b.Batching and Weighing Equipment .................................................... 1103.02
c.Automatic and Semi-Automatic Batching Equipment ......................... 1103.03
d.Mobile Portland Cement Concrete Plants .......................................... 1103.04
e.Water Supply Equipment ................................................................... 1103.11
1019.04 Mix Design Criteria, Mixing, and Proportioning. The mix design
shall meet the following criteria. Mix Design Criteria Parameter Value Flow ≥ 7 in. (178 mm) Air Content 0 – 25 % Dynamic Cone Penetration (DCP) at 3 days ≤ 1.5 in./blow (38 mm/blow) Compressive Strength at 28 and 180 days ≥ 30 psi (207 kPa) to < 150 psi (1034 kPa) The mix shall be produced according to Section 1020. The mixer drum shall be emptied prior to initial batch to ensure that no additional cement fines are incorporated into the mix. The Engineer reserves the right to adjust the proportions of the mix design in the field to meet the design criteria, provide adequate flowability, maintain proper solid suspension, and meet other criteria established by the Engineer. Controlled Low-Strength Material (CLSM) Art. 1019.06
1019.05 Department Mix Design. The Department mix design shall be Mix 1,
2, or 3 and shall be proportioned to yield approximately one cubic yard (cubic meter). Mix 1 Portland Cement 50 lb (30 kg) Fly Ash – Class C or F 125 lb (74 kg) Fine Aggregate – Saturated Surface Dry 2900 lb (1720 kg) Water 50-65 gal (248-322 L) Air Content No air is entrained Mix 2 Portland Cement 125 lb (74 kg) Fine Aggregate – Saturated Surface Dry 2500 lb (1483 kg) Water 35-50 gal (173-248 L) Air Content 15-25 % Mix 3 Portland Cement 40 lb (24 kg) Fly Ash – Class C or F 125 lb (74 kg) Fine Aggregate – Saturated Surface Dry 2500 lb (1483 kg) Water 35-50 gal (179-248 L) Air Content 15-25 %
1019.06 Contractor Mix Design. A Contractor may submit their own mix
design and may propose alternate fine aggregate materials, fine aggregate gradations, or material proportions. Article 1020.05(a) shall apply and a Level III PCC Technician shall develop the mix design. The mix design shall include the following information.
a.Source of materials.
b.Gradation of fine aggregate.
c.Specific gravities, material proportions, and any other parameters used in the mix design process.
d.Type and proposed dosage of admixtures.
e.Target flow and air content.
f.Test data indicating compressive strength at 28 and 180 days. If the Contractor submits a mix design which has not been previously verified by the Department, a trial batch shall be performed. The trial batch shall be scheduled a minimum of 30 calendar days prior to anticipated use and shall be performed in the presence of the Engineer. A minimum of 1 cu yd (0.75 cu m) trial batch shall be produced and placed offsite. The trial batch shall be produced with the equipment and methods intended for construction. The trial batch will be evaluated for A rt. 1020.04 Portland Cement Concrete temperature, flow, air content, dynamic cone penetration (DCP), and 28 day compressive strength by the Engineer. The Engineer reserves the right to require a 180 day compressive strength test. Verification of the mix design will include the trial batch test results, field observations (i.e. flowability and solid suspension), and other criteria as determined by the Engineer. The Contractor will be notified in writing of verification. Verification of a mix design by the Engineer shall in no manner be construed as acceptance of any CLSM produced. The Department will maintain a qualified product list.
1019.07 Sampling and Testing. The sampling and testing of CLSM shall be
according to ITP 307, "Sampling and Testing of Controlled Low-Strength Material (CLSM)". The dynamic cone penetration test (DCP) shall be according to ITP 501, "Dynamic Cone Penetration (DCP)". SECTION 1020. PORTLAND CEMENT CONCRETE
1020.01 Description. This item shall consist of the materials, mix design,
production, testing, curing, low air temperature protection, and temperature control of concrete.
1020.02 Materials. Materials shall be according to the following.
Item Article/Section
a.Cement ................................................................................................... 1001
b.Water ...................................................................................................... 1002
c.Fine Aggregate ....................................................................................... 1003
d.Coarse Aggregate ................................................................................... 1004
e.Concrete Admixtures .............................................................................. 1021
f.Finely Divided Minerals ........................................................................... 1010
g.Concrete Curing Materials ...................................................................... 1022
h.Straw ........................................................................................ 1081.06(a)(1)
i.Calcium Chloride ............................................................................... 1013.01
j.Grout and Nonshrink Grout ..................................................................... 1024 0.03 Equipment. Equipment shall be according to the following. Item Article/Section
a.Concrete Mixers and Trucks .............................................................. 1103.01
b.Batching and Weighing Equipment .................................................... 1103.02
c.Automatic and Semi-Automatic Batching Equipment ......................... 1103.03
d.Water Supply Equipment ................................................................... 1103.11
e.Membrane Curing Equipment ............................................................ 1101.09
f.Mobile Portland Cement Concrete Plants .......................................... 1103.04
1020.04 Concrete Classes and General Mix Design Criteria. The classes of
concrete shown in Table 1 identify the various mixtures by the general uses and mix design criteria. If the class of concrete for a specific item of construction is not specified, Class SI concrete shall be used.
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Source: Illinois Standard Specifications for Road and Bridge Construction, 2022 Edition. Pages 835–837 of 1,217. View official source ↗