ice control, landscape, horticulture, road base material, (crack sealing, chip sealing and slurry sealing), thermal products, sports arenas and construction, (backfill behind retaining walls and bulkheads, pipe covering, footings, and sub-base for slabs).
Aggregate is all natural, lightweight, yet durable quality makes it valuable in many areas, such as ice control, landscape, horticulture, road base material, (crack sealing, chip sealing and slurry sealing), thermal products, sports arenas and construction, (backfill behind retaining walls and bulkheads, pipe covering, footings, and sub-base for slabs).

Engineers Test Results

Aggregate is all natural, lightweight, yet durable quality makes it valuable in many areas, such as ice control, landscape, horticulture, road base material, (crack sealing, chip sealing and slurry sealing), thermal products, sports arenas and construction, (backfill behind retaining walls and bulkheads, pipe covering, footings, and sub-base for slabs).
METHOD OF TEST FOR DURABILITY INDEX
(California Test 229)
Sediment Height 0.0
Durability Index 100

METHOD OF TEST FOR SPECIFIC GRAVITYAN DABSORPTION OF COURSE AGGREGATES
(California Test 206)
Bulk Specific Gravity Oven Dry Basis 1.65
Percent Absorption 10.6

 

The following test results were performed by Smith-Emery GeoServices on March 13, 2003. These tests were done on Product # 8 for a lightweight backfill contract. (See Cal Trans Specifications 10-1.25 Imported Borrow Lightweight.)

The following tests were performed by John R. Byerly, Inc, for a sub-base under a bridge for the Port of Long Beach. Preparation and tests were performed in accordance to California State and ASTM test methods.

SIEVE ANALYSIS
Sieve Analysis (ASTM C136-84)
Sample 1" x #4
Date Sampled: 11/18/98
Sieve Size Percent Passing Project Specs.
1 1/2" 100 95-100
1" 72 60-85
3/4" 34  
5/8" 14 10-40
1/2" 5 0-15
3/8" 4  
No. 4 3 0-10
No. 8 2.9  
No. 16 2.7  
No. 30 2.5  
No. 50 2.2  
No. 100 1.7  
No. 200 1.4  
STANDARD TEST METHOD FOR UNIT WEIGHT AND VOIDS IN AGGREGATE
(ASTM C29/C29M-91A)
Dry Unit Weight 45.6 lbs. per cubic ft.
Saturated Unit Weight 50.4 lbs. per cubic ft.
Aggregate is all natural, lightweight, yet durable quality makes it valuable in many areas, such as ice control, landscape, horticulture, road base material, (crack sealing, chip sealing and slurry sealing), thermal products, sports arenas and construction, (backfill behind retaining walls and bulkheads, pipe covering, footings, and sub-base for slabs).

LIGHTWEIGHT AGGREGATE TESTING, Oct. 30th, 2009
METROPOLITAN WATER DISTRICT
CARBINE CANYON, CALIFORNIA

Smith-Emery GeoServices soil laboratory completed testing lightwieght aggregate unit weight ASTM C29 and sieve analysis ASTM C136 standard test.

The sample was split into two (2). One was oven dried, and the other soaked in water for 24 hours. The oven dried sample loose unit weight was determined by filling a measure to overflowing by means of scoop. The discharging of aggregate gieght was not greater than two (2) inches above the top of the measure. After the measure was filled, the surface of aggregate was leveled with fingers or straightedge, then weight the sampel with the measure. The moist compacted unit weight was determined by rodding each layer by 25 strokes of tamper rod of 5/8" diameter, with each layer filled up to approximately one third (1/3) of the measure height and the process continued until the measure is completely filled.

Sieve Analysis an dMaterials Finer Than No.200 Sieve ASTM C136/C117

Sieve Size U.S. Standard Cumulative Percent Passing
3/8" 100
#4 12
#8 3
#16 3
#30 2
#50 1
#100 1
#200 0.4

Unit Weight of Aggregate ASTM C29

Test Results Specification
Loose Unit Weight (Dry) 41.6 (pcf) -
Moist Unit Weight (Rodded) 54.9 (pcf) Less than 60 pcf

 

GRADING (CAL TSET 202/ASTM C136)

Sieve Size Product #8 Specification
U.S. Standard in (inches) Equivalent in (mm) Percentage Passing
1 1/2" 37.5 mm 100 100
1" 25 mm 100 95-100
3/4" 19 mm 100 90-100
3/8" 9.5 mm 40.3 15-85
No.4 4.75 mm 11.5 -
No. 200 75 µm 0.5 0-9

 

 

 

 

 




SPECIFIC GRAVITY AND ABSORPTION CAL TEST METHOD 206 AND 207

Test Fine Aggregates Coarse Aggregates
Bulk Sp. Gravity SSD 2.621 1.820
Apparent Sp. Gravity 2.703 2.000
% Absorption 1.870 11.300

UNIT WEIGHT

Test Product #8 Specificaton
Pcf Kg/m³
SSD Unit Weight as Calculated 55.8 894 960 kg/m³
Dry Loose Unit Weight 50.6 811 -

QUALITY REQUIREMENTS

Test Result Specification
Durability Index 95% 35 min.
R-Value R-Value could not be determined due to less fines 50 min.

Analytical Report
Corrosion Series - Summary of Data
pH Soluable Sulfates per ca. 417 - ppm Soluable Chlorides per ca. 422 - ppm Min. Resistivity per ca. 643 - Ohm-cm
8.1 40 77 5,256
Test Results by Anahem Test Laboratory
Aggregate is all natural, lightweight, yet durable quality makes it valuable in many areas, such as ice control, landscape, horticulture, road base material, (crack sealing, chip sealing and slurry sealing), thermal products, sports arenas and construction, (backfill behind retaining walls and bulkheads, pipe covering, footings, and sub-base for slabs).

CAL TRANS SPECIFICATIONS
10-1.25 IMPORTED BORROW (LIGHTWEIGHT
AGGREGATE)

Imported borrow (lightweight aggregate) shall conform to the provisions in Section 19, "Earthwork," of the Standard Specifications and these special provisions. Imported borrow (lightweight aggregate) shall consist of a rotary kiln expanded shale aggregate of the extruded type or a processed, naturally-occurring volcanic aggregate. Imported borrow (lightweight aggregate) grading shall be as specified in these special provisions. Imported borrow (lightweight aggregate) material, when deposited in place, shall conform to the following grading and quality requirements:

Grading Requirements
Sieve Sizes Percentage Passing
37.5-mm 100
25-mm 95-100
19-mm 90-100
9.5-mm 15-85
75 µm 0-9

Grading will be determined in conformance with the requirements of California Test 202, except shaking in the sieves shall be limited to 5 minutes.

Quality Requirements
Test Requirement
Resistance (R-Value) 50 min
Durability Index 35 min

 

When imported borrow (lightweight aggregate) is used as structure backfill for galvanized steel or reinforced concrete pipe culverts, the imported borrow (lightweight aggregate) shall have a minimum resistivity greater than or equal to 1000 ohm-cm and a pH greater than or equal to 5.5. For reinforced concrete pipe culverts, if the minimum resistivity of the native soil is less than 1,000 ohm-cm, imported borrow (lightweight aggregate) used as structure backfill shall have a chloride content less than or equal to 500 parts per million and a sulfate content less than or equal to 2000 parts per million. For aluminum or aluminum-coated steel culverts, imported borrow (lightweight aggregate) used for structure backfill shall have a minimum resistivity greater than 1,500 ohm-cm and a pH between 5.5 and 8.5. Minimum resistivity and pH shall be determined in conformance with the requirements of California Test Method 643, chloride content shall be determined in conformance with the requirements of California Test Method 422, and sulfate content shall be determined in conformance with the requirements of California Test Method 417.

At locations directed by the Engineer, the material used to backfill the outer 0.6-m portion of structure backfill adjacent to pipe and culvert inlets and outlets shall be a compacted impervious material, conforming to the provisions in Section 19-3.06, "Structure Backfill," of the Standard Specifications.

At locations directed by the Engineer, the structure backfill placed within 0.6-m of finished ground around abutments, abutment wingwalls, retaining walls, and other portions of structures shall be a compacted impervious material, conforming to the provisions in Section 19-3.06, "Structure Backfill," of the Standard Specifications. If the minimum resistivity of the native soil is less than 1,000 ohm-cm, then the imported borrow (lightweight aggregate) shall have a chloride content less than or equal to 500 parts per million and a sulfate content less than or equal to 2000 parts per million.

When imported borrow (lightweight aggregate) is used as embankment material for geosynthetically reinforced embankments, the pH shall be between 4.5 and 9 as determined in conformance with the requirements of California Test Method 643.

Imported borrow (lightweight aggregate) shall have a maximum calculated saturated surface dry unit weight of 960 kg/m 3 . The saturated surface dry unit weight shall be calculated using the dry loose unit weight and the absorption of the coarse and fine aggregates. Dry loose unit weight shall be determined in conformance with the requirements in California Test Method 212, using test procedure (b) Compaction Method (by jigging). Absorption of the coarse and fine aggregates shall be determined in conformance with the requirements in California Test Methods 206 and 207, except that the samples shall be oven dry before soaking and shall be soaked for 24 hours plus or minus 30 minutes. Saturated surface dry unit weight shall be calculated as follows:

  • 1. multiply the percent coarse aggregate by the absorption of the coarse aggregate;
  • 2. multiply the percent fine aggregate by the absorption of the fine aggregate;
  • 3. add the two values from 1. and 2. and divide by 10000;
  • 4. add one (1) to the result from 3. and multiply by the dry loose unit weight.

Imported borrow (lightweight aggregate) shall be placed and compacted to the designated dimensions in conformance with the provisions in Sections 19-1.03, "Grade Tolerance," and 19-6, "Embankment Construction," of the Standard Specifications. The provisions in Section 19-5, "Compaction," of the Standard Specifications shall not apply.

Initial layers of imported borrow (lightweight aggregate) may be placed by end dumping from trucks, or by any other method approved by the Engineer.

Imported borrow (lightweight aggregate) shall be spread or placed in such manner that will prevent bulking of the material and minimize particle breakdown. Imported borrow (lightweight aggregate) shall be compacted in uniform layers not to exceed 0.2-m thickness before compaction. Compaction shall be obtained by a minimum of 3 complete coverage passes using smooth drum steel roller compaction equipment imposing contact force of 1,850 kg per-meter-width of the roller face. Track type equipment which imposes the equivalent contact pressure as that specified for steel drum rollers, as determined by the Engineer, may be used provided the 3 complete coverages of the tracks of the track type equipment are achieved. Sufficient moisture treatment shall be made to aid the compactive effort. Compaction using pneumatic-tired equipment or compaction within trenches or other limited-access areas, or compaction in areas of low confining pressure, shall be by a method approved by the Engineer. When alternative compaction equipment and methods of compaction (including use of pneumatic-tired equipment in trenches, in limited-access areas, and areas of low confining pressure) are proposed by the Contractor, a test site placing and compacting lightweight aggregate material shall be constructed. The alternative compaction equipment and methods of compaction shall not be used until, evaluation of the test site by the Engineer and the alternative methods and equipment have been approved by the Engineer.

Quantities of imported borrow (lightweight aggregate) shall be paid for by the cubic meter calculated on the basis of the mass, measured in place in conformance with the provisions in Section 9-1.01, "Measurement of Quantities," of the Standard Specifications divided by the 95 percent of the dry unit weight measured in conformance with the requirements in California Test Method 212, using test procedure (b) Compaction Method (by jigging).

The contract price paid per cubic meter for imported borrow (lightweight aggregate) shall include full compensation for furnishing all labor, materials, tools, equipment, and incidentals, and for doing all the work involved in constructing imported borrow (lightweight aggregate), complete in place (including constructing and removing any test sites required), as shown on the plans, as specified in these special provisions, and as directed by the Engineer.