Attachment F - Self-compacting fill

VA R O C K Y M O U N TA I N R E G I O N A L M E D I C A L C E N T E R — A U R O R A , C O

Squeegee Specification
Info Sheet — Map 32
Self-compacting fill for two sink pits — response support for RFI Item 7

ITEM

RFI

LOCATION

Map 32 — Self-Compacting Fill

Item 7 — Map 32

Landscaped rock-mulch area
adjacent to a building

PIT 1

PIT 2

TOTAL IN PLACE

Approx. 30 CY

Approx. 200 CY

Approx. 230 CY

SOW basis (Map 32): “Two sink pits recently formed and have since stopped progressing. Contractor shall fill pits as appropriate with squeegee or similarly approved self compacting fill and restore top of sink pits to match surrounding area.” This sheet confirms the material, gradation, and placement method on that basis. Suggested RFI response — paste-ready:
“Squeegee conforming to the AASHTO M 43 / ASTM D448 Size No. 8 gradation in Section 2 of this sheet is approved for Map 32, subject to contractor submittal of the supplier gradation before delivery and placement by the method in Section 5, including lift densification and post-placement top-up.”

1 — APPROVED MATERIAL: APPROVE BY GRADATION, NOT BY NAME

The approved material is clean, open-graded crushed stone or crushed gravel meeting Size No. 8 below, sold locally as “squeegee.” Approval attaches to the gradation, not to the trade name alone. Colorado suppliers use “squeegee” inconsistently — for small round rock, for sifted crusher fines, and for fine pea gravel. The contractor must submit the supplier’s gradation report (ASTM C136 / AASHTO T 27) showing compliance before delivery. No material is approved on name alone.
In Colorado usage, Colorado State University Extension describes squeegee as sifted “crusher fines” that packs down more than pea gravel, and Raptor Materials (northern Colorado) describes squeegee rock as specially graded crushed stone used for drainage, pipe bedding, surface stabilization, and erosion control. Those descriptions support the use here, but they do not replace a gradation submittal.

2 — GRADATION — AASHTO M 43 / ASTM D448, SIZE NO. 8

Sieve

Size (mm)

Percent passing by weight

1/2 in

12.5 mm

3/8 in

9.5 mm

85–100

No. 4

4.75 mm

10–30

No. 8

2.36 mm

0–10

No. 16

1.18 mm

0–5

Test method: ASTM C136 / AASHTO T 27. This is the standard No. 8 band routinely described by quarries and state agencies as opengraded, self-compacting aggregate.

Squeegee Spec Info Sheet — Map 32 / RFI 7

3 — PHYSICAL REQUIREMENTS

Composition: Clean, hard, durable crushed stone or crushed gravel. Angular to sub-angular particles are preferred because they interlock.