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<br />l. <br /> <br />" <br /> <br />. <br /> <br />Any difference of opinion between the engineer and the contractor shall <br />be resolved by dumping and checking the gradation of two random truck <br />loads of stone. Mechaniea1 equi:pment, a sorting site, and labor needed <br />to assist in checking gradation shall be provided by the contractor at <br />no additional cost to the State. <br /> <br />10-2.2 - Wire-Enclosed Riprap -- Stone used for wire-enclosed rip- <br />rap shall meet the requirements of section 10-2.1 except for size and <br />gradation at stone. Stone used shall be well graded wi thin the sizes <br />available and 70 percent, by weight, sha1.l exceed in least d1meuion the <br />wire mesh opening. The maximum size at stone, measured n01'lll81 to the <br />slope, shall not exceed the met thickness. <br /> <br />Wire mesh shall be galvanized woven fencing conforming to the <br />specitications for Fence Fabric, section _, and shall be of the gage <br />and dimensions shawn on the plans. Ties and 1acill8 wire shall be 110. 9 <br />gage galvan1:r.ed unless otherwise specified. <br /> <br />10-2.3 - Grouted R1prap -- Grout tor grouted riprap shall coosist <br />of one part portland cement and three parts of sand, thoroughly mixed <br />wi th water to produce grout having a thick creamy consistency. The <br />minimum lIlIIOunt of water should be used to prevent excess shrinkage at <br />the grout after placement. The cement, sand, and mixing shall conform to <br />the specitications for Concrete Masonry, section _' <br /> <br />The stones tor grouted riprap shall meet the requirements ot <br />section 10-2.1 except tor size and gradation. Size and gradation will <br />be specified for each particular project. St.one shall be free ot tines <br />which prevent penetration of grout and care shall be taken in placing the <br />stone to keep earth or sand from filling the spaces between the stones. <br /> <br />10-2.4 - Coocrete Biprap in Bags -- Concrete riprep in bags shall <br />consist of class C concrete in cement sacks or sui table burlap bags. <br />Each bag shall cootain about 2/3 cubic foot at cOllcrete, securely tied <br />1t in cement sacks or folded 1t in burlap bags, and shall immediately be <br />placed in the work. <br /> <br />10-2.5 - Concrete-Slab Biprap u Concrete tor concrete-slab riprap <br />shall be class B unless t.he riprep is exposed to salt water, in which <br />case it shall be class A. The slabs shall be of two types, plain concrete <br />or reinforced. If reinforcement is specified, it shall be furnished as <br />shawn on the plans. Except as modified herein, materials and construction <br />. shall conform to specificatiou for Concrete Masonry, section _' <br /> <br />10-2.6 - Filter Blanket -- The filter blanket shall consist of one <br />or more layers of gravel, crushed rock, or sand of the thickness shown on <br />the plans. The gradation of material in each layer of the filter blanket <br />shall meet the requirements of the special provisions. All material <br /> <br />. <br /> <br />11-39 <br />