215Cement shall be approximately 1/3 calcium sulfoaluminate (C4A3S) and 2/3 dicalcium silicate (C2S) or other hydraulic cement that will provide a Latex-Modified Concrete that meets the physical requirements indicated in this section. The LMCVE shall contain a minimum 658 lbs per cubic yard of rapid hardening cement, 15% styrene butadiene latex by weight of cement, water not to exceed a water-cement ratio of 0.40, and aggregates as proposed by the Contractor for the mixture. The compressive strength minimum shall be 2500 psi at 3 hours and 3500 psi at 24 hours. Compressive strength specimens shall be cured in the molds in the same environment as the in-place LMCVE tested. Specimens shall remain undisturbed at the site for 2 hours and shall be transported to the testing lab for testing. Prior to placing overlay the Contractor shall calibrate the mobile concrete mixers. Once the mixers are calibrated, the mixtures shall be sampled and tested for slump and air content. The Contractor shall prepare and test specimens to demonstrate that the concrete mixture shall obtain a compressive strength of at least 2500 psi within 3 hours at the curing temperatures in which the overlay will be placed, and a compressive strength of at least 3500 psi at an age of 24 hours. All trial batching and prepatory work prior to placing LMCVE shall be at the Contractor’ s expense. During the placement of the overlay the Contractor shall take samples for testing for compressive strength. Permeability, slump and air content measurements will not be required, but may be performed by the Engineer.
217.14 High Early Strength Latex Modified Concrete (HESLMC) for Bridge Deck Overlays
High Early Strength Latex Modified Concrete (HESLMC) shall conform to the requirements herein and Table II-17, Latex hydraulic cement concrete overlay, except as follows: The compressive strength minimum shall be 3500 psi in 7 days. Prior to placing overlay the Contractor shall calibrate the mobile concrete mixers. Once the mixers are calibrated, the mixtures shall be sampled and tested for slump and air content. The Contractor shall prepare and test specimens to demonstrate that the concrete mixture will obtain a compressive strength of at least 3500 psi at an age of 7 days. All trial batching and preparatory work prior to placing HESLMC shall be at the Contractor’ s expense. Permeability, slump and air content measurements will not be required, but may be performed by the Engineer. SECTION 218—HYDRAULIC CEMENT MORTAR AND GROUT
218.01 Description
These specifications cover hydraulic cement mortar and grout used in bonding units together, filling voids, and making surface repairs.
218.02 Materials
a.Hydraulic cement shall conform to Section 214.
b.Fine aggregate shall conform to Section 202.218.02 216(c) Water shall conform to Section 216.
d.Admixtures shall conform to Section 215.
218.03 Detail Requirements
Hydraulic cement mortar and grout shall consist of a mixture of hydraulic cement, fine aggregate, water, and admixtures as specified herein. Hydraulic cement mortar and grout shall contain from 3 to 7 percent entrained air. Air-entrained hydrau - lic cement may be used. The Contractor or supplier shall mix hydraulic cement mortar and grout with the minimum amount of water necessary to obtain the required consistency.
a.Hydraulic cement mortar shall consist of 1 part hydraulic cement, 2 1/2 parts fine aggregate by weight, and sufficient water to produce a stiff mixture. Grading C fine aggregate shall be used.
b.Nonshrink mortar shall consist of 1 part hydraulic cement, 2 parts fine aggregate by weight, a set retarder or other admixture that will reduce the amount of required mixing water, and sufficient water to produce a stiff mixture. Grading C fine aggregate shall be used.
c.Hydraulic cement grout shall consist of 1 part hydraulic cement, 2 parts fine aggregate by weight, and sufficient water to produce a free-flowing mixture. Grading A or C fine aggregate shall be used.
d.High-strength grout and mortar shall consist of a commercially produced prepackaged, non shrink, hydraulic cement mixture conforming to ASTM C1107 modified by the following: The grout/mortar shall develop a 7-day compressive strength of at least 4,000 pounds per square inch when tested in accordance with ASTM C109, and a 7-day bond strength of at least 1,000 pounds per square inch when tested in accordance with VTM-41, except that epoxy shall not be used to develop the bond. SECTION 219—RIGHT-OF-W AY MONUMENTS
219.01 Description
These specifications cover concrete and metal markers used to designate right-of-way boundaries.
219.02 Detail Requirements
Right-of-way monuments shall be manufactured from reinforced concrete or metal conforming to the dimensions and details shown in the Standard Drawings, and in accordance with these specifications.
a.Concrete Monuments: Concrete shall be Class A3 conforming to Section 217, except that the Department will allow the use of Type I cement and a change in the aggregate size.218.02
Source: Virginia Road and Bridge Specifications, 2020 Edition. Pages 243–243 of 1,065.