Section 4124.� Aggregate for Slurry Mixtures

 

4124.01���� DESCRIPTION.

Crushed stone.

 

4124.02���� GRADATION.

Meet the requirements for Gradation No. 22 or No. 23 (as specified in the contract documents) of the Aggregate Gradation Table, Article 4109.02.

 

4124.03���� QUALITY.

Type 4 or better friction classification aggregate as shown in Materials I.M. T203. Meet the requirements of Table 4124.03-1 based on aggregate crushed to 3/4 inch (19 mm) nominal size.

 

Table 4124.03-1: Aggregate Quality (Slurry Mixtures)

Aggregate Quality

Maximum Percent Allowed

Test Method

Abrasion�

40

AASHTO T 96

A Freeze

10

Office of Materials Test Method No. Iowa 211, Method A

Alumina(a)

0.7

Office of Materials Test Method No. Iowa 222

Sand Equivalence

45 (Minimum)

AASHTO T 176

Organic Materials

0.01

Office of Materials Test Method No. Iowa 215

(a)�� If the Alumina value fails, determine the A Freeze value for specification compliance. Office of Materials Test Method No. Iowa 222 does not apply to gravel.