Section 610 — Sidewalks, Pads, and Medians

Description

610.01This work consists of constructing sidewalks, pads, and medians.

Material

610.02Conform to the following Subsections: Concrete grid paving units 725.09(c) Elastomeric joint sealant 712.01(a) (4) Paving brick 725.08 Preformed expansion joint filler for concrete 712.01(b) (1) Soil and soil- aggregate materials 704.01 Solid concrete interlocking paving units 725.09(f)

Construction Requirements

610.03General. Excavate and backfill according to Section 209. Place bedding material in lifts no more than 4 inches in compacted thickness. Compact each lift with at least three passes of a lightweight mechanical tamper, roller, or vibratory system.

610.04Concrete Sidewalks, Pads, and Medians. Construct minor concrete according to Section 601. Use forms extending the full dept h of concrete.

(a)Joints. Construct joints perpendicular to the outside slab edges and other joints. Match the joints in adjacent curb or pavement. Tool and remove free mortar and concrete from joints.

(1)Expansion joints. Construct at intervals no more than 20 feet. Use ¾ -inch thick preformed expansion joint filler for the full depth of the joints. If joints are sealed, use elastomeric joint sealant.

(2)Contraction joints. Construct at intervals no more than 10 feet. Form joints with a jointing tool or saw joint s to a depth of ¼ to ⅓ the thickness of the concrete and about ⅛ inch wide.

(3)Construction joints. Form construction joints around appurtenances (such as manholes, utility poles, buildings, and bridges). Use ½- inch thick preformed expansion joint filler for the full depth of the joints. If joints are sealed, use elastomeric joint sealant.

(b)Finishes. Provide a sidewalk finish unless otherwise specified.

(1)Sidewalk finish. Conform to Subsection 552.12(c)(2) .

(2)Exposed aggregate finish. Conform to Subsection 552.12(c)(4) . Use a ¼ -inch radius edging tool on slab edges and joints. Cure the concrete according to Subsection 552.13. Protect the work for 72 hours. 702 610.05 As phalt Concrete Sidewalks, Pads, and Medians. Perform the work according to Section 403, Type II.

610.06Concrete Paving Unit and Paving Brick Sidewalks, Pads, and Medians. Lay units or bricks in successive courses on a prepared surface. Lay each course to grade. Relay courses that deviate from a straight line by more than 2 inches in 30 feet. Sweep and inspect the surface before the bed sets. Remove and replace imperfect units or bricks. Chock the joints flush with a dry m ixture of 4 parts sand and 1 part cement by mass and carefully water the surface to saturate the joint filler.

610.07Acceptance. See Table 610-1 for sampling, testing, and acceptance requirements. Paving brick, concrete paving units, and joint filler and sealant will be evaluated under Subsections 106.02 and 106.03. Construction of sidewalks, pads, and medians will be evaluated under Subsections 106.02 and 106.04. Asphalt concrete will be evaluated under Section 403. Excavation and backfill will be evaluated under Section 209. Minor concrete will be evaluated under Section 601.

Measurement

610.08Measure the Section 610 pay items listed in the bid schedule according to Subsection 109.02 .

Payment

610.09The accepted quantities will be paid at the contract price per unit of measurement for the Section 610 pay items listed in the bid schedule. Payment will be full compensation for the work prescribed in this Section. See Subsection 109.05 . Table 610-1 Sampling, Testing, and Acceptance Requirements

Material or

Product

(Subsection) Type of

Acceptance

(Subsection) Characteristic Category Test Methods

Specifications Sampling

Frequency Point of

Sampling Split

Sample Reporting

Time Remarks

Source

Bedding

material (704.01 ) Measured & tested for conformance (106.04 & 105) Gradation − Subsection

704.011 per soil type & source of material Source of material Yes Before using in work Not required if using

Government

-furnished source Liquid limit − AASHTO R 58 & T 89, Method A " " " " "

Production

Bedding

material (704.01 ) Measured & tested for conformance (106.04 ) Gradation – AASHTO T 27 & T 11 1 per 600 yd3 Production output or stockpile Yes 4 hours – Liquid limit – AASHTO R 58 & T 89, Method A " " " " –