- 164 - SECTION 305 -- CRUSHED ROCK BASE COURSE
305.01 Description
1.The Contractor shall complete the following requirements under the “Crushed Rock for Base Course” and “Crushed Rock Screenings for Base Course” bid items:
a.Furnish, place, shape, and compact a course of crushed rock or crushed rock screenings on a profiled subgrade
305.02 Material Requirements
1.Crushed rock and crushed rock screenings for the crushed rock base course shall conform to the requirements of Subsection 1033.02, Paragraphs 1, 2, and 8; and Table 1033.09.
305.03 Construction Methods
1.The Contractor shall windrow the material to maintain uniform particle distribution. The Contractor sha ll exercise particular care in loading, hauling, and distributing the crushed rock to avoid segregation of the coarse and fine particles. Windrowing may be waived if the rock particle distribution is uniformly maintained.
2.The Contractor shall spread crushed rock screenings for the base course uniformly over the prepared subgrade and then moisten and compact them.
3.The crushed rock for base course shall then be hauled, distributed, spread, and compacted in such a manner as to avoid displacement of the underlying layer of screenings.
4.After the crushed rock has been placed on the roadbed, the Contractor shall spread it uniformly over the width of the proposed base course. Water shall be ap plied as necessary to facilitate compaction and bonding of the materials.
5.The Contractor shall roll t he Base Course until no further compaction can be obtained.
6.The Contractor shall spread a final light application of crushed rock screenings uniformly over the surface of the base course to close large voids and provide a smooth and uniform surface. The final finish of the base course shall be obtained by rolling wi th the multiple-wheeled, pneumatic- tired roller to produce a smooth, tightly-knit surface. Water shall be added as necessary to achieve the surface finish.
305.04 Method of Measurement
1.The weight of crushed rock will be measured on approved scales.
2.A copy of the weight ticket shall accompany each load to the placement site and be furnished to the Engineer.
3.Water applied will be measured in accordance with Subsection 302.04. Crushed Rock Base Course 305.05 - 165 - 305.05 -- Basis of Payment
1.Pay Item Pay Unit Crushed Rock for Base Course Ton (Tn) [Megagram (Mg)] Crushed Rock Screenings for Ton (Tn) Base Course [Megagram (Mg)] Water 1,000 Gallons (MGAL) [ k i l o l i t e r ( k L ) ]
2.Payment is full compensation for all work described in this Section. - 166 - SECTION 306 -- GRANULAR FILL
306.01 Description
1.The Contractor shall complete the following requirements under the "Granular Fill" bid item:
a.Furnish and place a layer of compacted granular material. The granular fill shall be constructed in accordance with these Specifications and in conformity with the lines, gr ades, quantity requirements, and cross sections shown in the contract.
306.02 Material Requirements
1.The granular material shall meet the requirements in Subsection 1033, and Table 1033.02, Clas s B, unless specified otherwise in the contract.
306.03 Construction Methods
1.The Contractor shall haul the granular fill material to the road, spread it in uniform layers, and com pact it to not less than 100% of maximum density as determined by NDOT T 99.
2.Any portion of the granular fill which is to be used as aggregate in a bituminous sand base course mixture need not be compacted.
3.This work shall be performed in accordance with the requirements in Subsection 205.03.
306.04 Method of Measurement
1.The Contractor shall number, l abel, and tally the delivery tickets and then prepare a report of the quantitie s and distribution of the materials. A copy of the report shall be given to the Engineer at the end of each day when hauling materials.
2.Granular material shall be measured in cubic yards (cubic meters) at the point of delivery. T he Contractor shall level the material even with the top of the truck's hauling box to allow accurate volume measurement.
3.Instead of leveling the material in the hauling vehicles, the Contractor may heap the loads to an agreed volume.
4.Water applied at the Engineer's direction will be measured in accordance with Subsection 302.04.
306.05 Basis of Payment
1.Pay Item Pay Unit Granular Fill Cubic Yard (CY) [Cubic Meter (m3)] Water 1,000 Gallons (MGAL) [kiloliter (kL)] 2. Payment is full compensation for all work described in this Section.
Source: Nebraska Standard Specifications for Highway Construction, 2017 Edition. Pages 198–199 of 1,048.