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HomeMy WebLinkAboutOrd. No. 1924-1692 ORDINANCE No., 169 Specification NOT-5. FOR CONSTRUCTION OF PAVEMENT IN THE CITY OF ELSINORE, CALIFORNIA, CONSIST- ING OF ASPHALTIC CONCRETE BASE AND WILLITE PROCESS ASPHALTIC CONCRETE NEARING SURFACE. CITY ENGINEER. The work herein provided for is to be done in ace ante with the plans, profiles and cross - sections on file in the of fiee.of the City Engineer of the City of Elsinore, and all work shall, during its progress and on its completion, conform to the lines and levels which may, from time to time be given by the City Bagineer. GRADING. Grading shall include all filling and the removal of all earth, stones, rock, or other material that may be encountered, and shall include all other work that may be necessary to bring t: street to its official grade, sub -grade and cross - section. When m, or other soft material is encountered in the roadway, it shall be taken out and the space filled with good earth or gravel deposited in layers not to exceed six (6) inches in thickness. Each layer shall be thoroughly dampened and then thoroughly tamped solid with heavy iron tampers. The Contractor, however, in such cases, will not be required to excavate the mud or other soft material to a greater depth than two (2) feet below grade or sub- grade. All places excavated below grade or sub -grade shall be refilled by the Contractor with selected, suitable material, brought up in layers not to exceed'six (6) inches in thickness, dampened and then com- pacted with heavy iron tampers. When hardpan, cement, gravel or rock is encountered in the excavation of roadways of streets not tc be paved, such material shall be removed to a depth of four (4) inches below grade and the space filled with good earth or selected suitable material containing not more than fifty (50) per cent of sand or silt, and having in it no stones or hard lumps that shall exceed one and one -half (1 1 /2) inches in any dimension. The space over which fills are to be made shall first be cleared of all grass brushy trash, debris, or other perishable material. All fills shall be made of good sound earth. Embankments shall be carried up in full width, in horizontal layers not to exceed one (1) foot in thic mess and each layer, after beinglevelled off, shall be thoroughly saturated with water. Teams shall be made to travel as evenly as possible over the whole surface of each layer, and the formation of well - defined ruts is especially prohibited. The sub -grade for portions of the street to be paved shall be parallel to the finishe grade and such distance below it as is shown on the plans and adopt ad cross- sections and by the stakes set by the City'Eagineer. on roadways to be paved, the sub -grade shall immediately prior to the placing of the pavement, be soorified, thoroughly dampened and then rolled with a power roller weighing not less than four hundred (400 pounds per linear inch width of tire until the surface is hard and unyielding and at proper elevation., On roadways to be pace=d, where grading is not included in re- solution therefor and where grading is not shown on the official plans, the work of preparing the sub -grade shall be considered as a part of the work of paving. SPECIFICATIONS AND MATERIALS. Grushed'Rock: Crushed rock be derived from clean, hard and stone of uniform quality, free from disintegrated material or foreign matter. When tested with the Page -Deval A Machine it shall have an average French co- efficient of wear of not less than 8. Gravel: Gravel shall consist of particles of stone. It shall be free of dust, loam, clay, or other foreign matter. The rock or rocks from which it is derived shall be hard and tough. When tested with the Page -Deval Abrasion Machine, they shall show an aver- age French co- efficient of wear of not less than 8. Sand: Sand shall be clean, hard - grained, and moderately sharp. It shall contain not more than 3 per cent of mica or 1 clay, organic, or other earthly impurities. The sand shall paas a 10 -mesh screen, and not less than 95 per cent by weight of material shall be retained on a 200 -mesh screen. Filler: Filler shall consist of finely grougd stone dust or Port - land cement# It shall all pass a 50- mesh`'screen, and at least 66 per cent shall pass a 200 -mesh screen. Asphalt: The asphaltic cement shall be prepared from the products of crude asphalt petroleum: It shall be tested in accor anee with methods prescribed by the American Society for Testing Mi terials, and the U. S. Bureau of Public Roads, the following requirements: (a) It shall be homogeneous and free (b) Penetration of original sample at 5 seconds, with 100 gamme w#ight shall be from cement to be used in Willite Process Asphaltic and shall conform to from water. 77 degrees F. during!, 60 to 70 for Asphaltic Concrete Wearing Sur- face, and from 45 to 55 for Asphaltic Cement to be used in Asphal Cement Base. (c) Loss after heating 5 hours at 325 degrees F.shall not be more than 2 per cent. (d) Total bitumen soluble in carbon disulfide--99,5 per cent. (e)` Total bitumen soluble in carbon tetrachloride 98 per cent. (f) Difficulty not less than 75 centimeters. Copper S'LIphate: Copper sulphate shall consist of thoroughly pul- verized commercial copper sulphate, all of which shall pass a 50 -mesh screen. INSPECTION. The City Engineer (which includes his qualified assist- ants) and the Willite Inspector shall have access at all times to all branches of the work, including the preparation of the grade, sub -grade asphaltic concrete base and Willite Process Asphaltic Wear- ing Concrete Surface. The final acceptance or rejection of the work shall be by the City Engineer or Street Superintendent as provided by law. Before any Asphaltic Concrete Base is laid, the approval of t the sub -grade must first be secured from the Willite Inspector, likewise the Asphaltic Concrete Base shall be prepared and laid in a manner satisfactory to the Willite Inspector, The Willite Inspector will pass upon the materials for the Willite Process Asphaltic Wearing Surface, is hereby given authority - to d ^termine the proportions -of the different materials; and to see that they are properly mixed and laid. The Contractor shall furnish tobeither the City Engineer or the Willite Inspector, whenever called upon to do so, samples of all thee sterials proposed to be used in the composition of the pavement. Tests will then be made to determine the quality of the materials.; 4 The making of the tests -shall be open to the Contractor and q" he will be informed of the results thereof. b . TE. FOR USE IN A mixture of asphaltic cement and copper sul- phate, made in the foblowing manner, shall hereinafter be known as Willite Process Asphaltic Cement; A bucket shall be provided in which the copper sulphate is to b be added to the asphaltic cement. The above bucket shall have twice the capacity of the maximum quantity of asphalt to be used in each batch. Provision shall be made for thoroughly mixing the copper sulphate with the asphalt. The required amount of asphalt, having a temperature of not less than 290 degrees F., nor more than 325 degrees F., shall be placed in the above bucket, and to it shall be added the copper sulphate hereinbefore specified, in an amount, by weight, equal to 2.66 per cent of the weight of the amount of asphalt contained in said bucket. This mixture shall be thoroughly and continuously agitated. ASPHALTIC CONCRETE BASE. The different ingredients:acomposing the Asphaltic Concrete Base shall contain the several materials, in proportion by weight of the whole mixture, as follows; Reek or gravel passing 1 1/2 inch screen, retained on 1 inch screen, 10 -20 per cent. Rock or gravel passing 1 ineg screen, retained on 1/2 inch screen, 20 -35 per cent. Rock or gravel passing 1/2 inch screen, retained on 1/4 inch screen, 10 -20 per cent. Rock or gravel passing 1/4 inch screen, retained on 10 mesh, 10 -20 per cent. l Passing through 10 mesh, 25 -35 per cent. ASPHALTIC CEMENT, 5 -7 per cent. (Passing 10 -mesh) Passing 10 -mesh, 100 per cent. Passing 10 -mesh, retained on 40 -mesh, 25 -35 per cent. Passing 40 -mesh, retained on 80 -mesh, 30 -40 per cent. Passing 80 -mesh, retained on 200 -mesh, 18 -35 per cent. Passing 200 -mesh, 0 -5 per cent. The exact proportions within the above limits shall be deter - ined;by the City Engineer, his qualified inspector, and the Willite CE; Inspector, and regulated to produce a dense mixture with a minimum of voids. ASPHALT CONCRETE WEARING SURFACE. The Rifferent ingredients compos the Asphaltic Concrete Wearing Surface shall contain the several materials, in proportion by weight, of the whole mixture as follows; Rock or gravel passing 1 inch screen, retained on 1/2 inch screen, 20 -40 per cent. Rock or gravel passing 1/2 inch screen, retained on 1/4 inch screen, 15 -25 per cent. Rock or gravel passing 1/4 inch screen, retained on 10 -mesh, 6 -17 per cent. Passing 10 -mesh screen, 25 -50 per cent. WILLITE PROCESS ASPHALTIC CEMENT, 6 1/2- 9 1/2 per cent. (Passing 10 -mesh) Passing 10 -mesh, 100 per cent. Passing 10 -mesh, retained on 40 -mesh, 25 -35 per cent. Passing 40 -mesh, retained on 80 -mesh, 30 -40 per cent. Passing 80 -mesh, retained on 200 -mesh, 20 -30 per cent. Passing 200 -mesh, 5 -10 per cent. The exact proportions within the above limits shall be deter- mi#ed by the City Engineer, his qualified inspector and the Willite Inspector, and regulated to produce a dense mixture with a minimum of voids. PREPARATION AND LAYING OF MIXTURE. The Plant; The preparation of all asphaltic mixtures specified herein shall be made through a plant of such a design as will be sufficient to continuously provide a homogenuous mix at the re- quired temperature. The plant shall be provided with sufficient bins, of the proper size, as will provide for the necessary segre- gation and grating of the materials. Provision shall be made to heat all asphaltic cement only by super- heated steam. It shall have a pug mill, equipped with the proper design and sufficient number of paddles as will thoroughly mix the several mterials in the $ pecified time, and turn out a homogeneous im ss, in which each and every particle of aggregate is completely coated with asphaltic cement. Mixing: The materials for the different types of pavements k 1 specified herein shall be heated, screened and mixed for the time shown in the following table; a 0 h� r-4 F4 0 0 CD CD on f a� 0 0 m +� ,4-t off/ H =C :] ,m :. m m tr gmm$4 A41 i �m w ,-t 0 A V ti 0, V ri-0 R1" to H 4m Oi @ e� v a m ri . H m .fit m m -P (D P�iR... 1 m @ � m ti 0 0 r-4 F4 0 0 CD CD T GV r-I H CAE H W H H H 0 o 02 Lo oz tQ I 0 M 02 D7 02 W 0 bO I 0 to CQ i 0 M CQ LO CQ N to V) f � 0 0 N to ,m :. m tr gmm$4 g O tb ,-t 0 A V ti 0, Am ri-0 R1" to fln Oi @ V Ai, r 64 � {Lt mi 0 V.! In which the number of bins and the size of material that each is t hold is specified in inches. The size of material fdr each bin is either that passing a 10 -mesh (10m) to the inch screen, or that rat tained upon any one screen and passing the next suceeedAng size. { The time shown in the table for dry mixing shall include the (( mixing of the cold stone dust and the hot sand, and rock or gravel, before the addition of the Willite Process Asphaltic Cement. ; ( All materials shall be carefully weigh6d each in the proportio specified by means of accurate multiple beam or dial scales, and the temperatures measured by armored thermometers. The mixtures, as dischargedfrom the plant into the conveyance to be used in hauling to the street or roadway, shall be of the temperatures as shown in the above table. All mixtures shall be hauled from the plant to the street or roadway in clean and suitable canvas covered wagons or trucks. The materials shall be received at the street or roadway at a temperature of not less than 240 degrees F. Laying Pavement; Before any Asphaltic Concrete is hauled to any street or roadway, the sub -grade shall have been carefully pre- pared in such manner that it will conform to the grades and cross- sections shown on the plans. It shall consist of a hard, uniform and smooth surface, to the extent that, at every place, it will support- without perceptible indentation- the wheels of heavilly loaded trucks. Where the soil is of sandy or gravelly nature, not suscept- ible to such a degree of compacting, provisions must be made for steel platforms on which to dump the hot asphaltic mixture before it is spread The Asphaltic Concrete Base shall be clean and dry before any wearing surface mixture is laid. Dmnediately preceding the laying of the Willits Process Asphaltic Wearing surface on the Asphalt Concrete Base, a small quantity of asphaltic cement (not more than 1/8 gallon per square yard) shall be uniformly applied to the base by means of a spraying machine or brooms. All surfaces of curbs, gutters, manholes and all cold pave- ment joints at which the wearing surface forms a junction, shall be painted with hot asphaltic cement. The mixture shall either be spread by a mechanical spreading device on the truck, or shall be dumped at such a distance from the pavement previously laid that all of it must be turned by means of hot shovels or forks to the place to which it is to be laid. It shall be uniformly spread to such a depth that, after rolling to its ultimate compression, it will have the required thickness. During the process of spreading and raking, care must be exercised to avoid footprints, but where found they shall be n loosened to their full depth with rakes. Joints shall be made by the use of canvas covered rope or plank and out clean at an angle of approximately 45 degrees before work is resumed. No lap joints will be permitted. The base cours shall be covered as soon as possible with the wearing surface. Rolling: Immediately after the mixture for either the base course or the wearing surface has been spread it shall be rolled with power rollers of at least the number and weight herinafter speeifi "ed and they shall be continually operated so as to secure the maximum density possible to attain. Provision shall be made to have at least two rollers on the work, each weighing not less than eight tons. In case it is con- templated to lay more than 1500 square yards of ether base course or wearing surface per day an additional roller must be prolided for each 1200 square yards, or fraction thereof, over and above the said 1500 square yards. The surface of the rollers shall be treated with just suffi- cient water as will prevent the mixture from adhering to them. The rolling shall be done in the following manner: A strip on each side, next to the gutter, or outside edge, shall first be rolled longitudinally, and the rolling shall be continued toward the center, in such a manner that each successive rolling shall lap the previous one by a distance of at least one foot. The forward progress of the roller at each longitudinal rolling shall be slightly less than that of the time previous, in order to facilitate the drainage of water. After the above longitudinal rolling, the pavement shall be rolled in a diagonal manner, and crosswise wherever the width of the street or the roadway will permit. Rolling shall be commenced as soon as possible after the mix- ture is spread, and the pavement shall be continuously rolled un- til it is unyielding and has received them maximum compression possible to obtain. All places inaccessible to the roller must be tamped with a hot iron tamper; and in case of a wearing surfacq, it must be ironed with a hot smoothing iron. Immediately after the completion of the rolling of the Willits Precess Concrete Wearing Surface a seal coat of asphaltic cement shall be apbiied. It shall be of a consistency to be flexible when cold, and shall be heated to between 200 degrees F. and 325 degrees F. and evenly spread with rubber squegees or mops pnlr, a sufficient coat shall be applied to flush the surface voids without leaving an excess. At least twenty pounds of dry stone screenings per square yard of surface shall then be evenly spread over the above seal coat, or as much more as necessary to take up any possible excess of asphalt, and then rolled. The screenings shall all pass a three - eighths (3/8) mesh screen, and seventy -five per cent shall be retained on a 10 -mesh screen. The delivery of the mixture to the street or roadway shall be done within such time that finals rolling can be completed before darkness. The resulting pavement must show an even and smooth surface to the extent that when a straight -edge eight feet long is laid upon it, the surface shall in no place vary from the lower edge of the straight -edge more than 1/4 inch. The base course shall be thoroughly barricaded, and no traffic allowed upon it until after the wearing surface has been laid. n After the wearing surface has received its final compression, no traffic shall be permitted upon it until it has cooled sufficient and in no case less than 24 hours. GENERAL REQUIREMENTS. Thoroughness and Engineer's Stakes; All work in every respect shall be executed in thorough and workmanlike manner. The Con- tractor is required to preserve all stakes set for the lines, levels or measurements for the work in their proper places until authorised to remove them by the City Engineer, and any expense in replacing said stakes which the Contractor or his sub - ordinates may have failed to preserve shall be borne by the Contractor. Discharge of Employees; Any over -seer, superintendent, laborer,,,, or other person employed on the work by the Contractor who shall perform his work in a manner contrary to these specifications, shall be discharged immediately, and such person shall lot again be employed on the work. Losses; All losses or damages arising from any unforeseen ob- struction or difficulties which may be encountered in the prosecu- tion of the work, from the action of the elements or from any act of omission not authorized by these specifications on the part of �'Z the Contractor,,or any person or agent employed by him, shall be OTC w sustained by the Contractor. Defective Work: No work which may be defective in its construct ion or deficient in any of the requirements of these specifications will be considered as accepted in consequence of the failure of any officer of the city or inspector connected with the work, to point out said defects or deficiency during construction, and the Contractor shall be required to correct any imperfect work, whenever discovered, before the final acceptance of the work. Performance of Work: The Contractor agrees to furnish all necessary labor and materials, and to Hilly complete said work in accordance with the plans and specifications and to the satisfact- ion of the Street Superintendent. Location of Work: Bidders must examine and judge for themselves as to the location of the proposed work, the nature of the excava- tion to be made, and the work to be done. Eagineerts Services: The Contractor shall give twenty -four (24) hours in writing when he shall require the services of the City Engineer for laying out any portion of the work. He shall dig all stake holes necessary to give lines and levels. Removal of Property and Debris: The Contractor shall be require to remove at his own expense, such as trees, stones, debris, etc., that may be in the way of making said improvements. In case it shall be necessary to remove the property of any owner of public utility or franchise, such owner will, upon proper application by the Contractor, be notified by the Street Superin- tendent to remove such property within a specified reasonable time.,Z __ti: and the Contractor shall not interfere with said property until after the expiration of the time specified. The right is reserved to the owners of public utilities or franchises to enter upon the street for the purpose of making rep pairs or changes of their property that may become necessary by the work. The City shall also have the privelege of entering upon the street for the purpose of repairing sewers, or making house drain connections therewith, or repairing culverts or storm drains. Any owner of a public utility, or owner of abutting property shall have, at any time before the time fixed in the contract for t, the commencement of the work, permission to remove at his own ex- 14 Q pense and to retain as his property any trees, hedges, fences, wa"I: pipes, poles or tracks wkich it may be necessary to remove in orde: to perform said work. The Contractor shall remove all surplus material and rubbish from the work after its completion and before he makes application for the acceptance of the work. The space between the sidewalk and the curb shall be brought to grade and evenly surfac6d. The Contractor shall not take earth from or put earth upon any private property without the owner =s consent. Debris such as fences, trees, stumps, or stones shall not be left upon private property in the vicinity of the work in any case. All debris must be removed from the work and in no case shall it be incorporated into or covered up with any filling. Closing Cross Streets; No more than one cross street shall be closed at any one time. Street Ordinances; The Contra for will be required to observe all the Ordinances of the Board of Trustees in relation to the obstruction of streets, keeping open passageways, and protectin g the same when they are exposed and would be dangerous to publiz travel. Barricades and iced Lights: It shall be his duty to erect aAd keep erected, by day and night, a fence or proper barrier along the line of work and across the ends of same, in order to guard the public effectively from danger of falling into trenches or from upsetting their vehicles against the earth thrown up during the progress of the work, and he shall post all proper notices and signals to the public of the state of the street while the work is in progress. A red light must be maintained at night at each end of the barriers, from sunset until sunrise, and a watchman employed as additional security whenever the same may be needed. Final Inspection: The Contractor shall notify the Street Superintendent when he desires a final inspection of the work, when the latter will, as soon as possible, make the necessary examination, and if the work is found in compliance with the above specifications, the Street Superintendent will furnish the Contractor with a certificate to that effect. Contractor: Whenever the word "Contractor" is used in these V specifications, it refers to the party or parties of the second part in the agreement for the construction of the work herein spec if led. Street Superintendent and City Engineer; Whenever the words "Street Superintendent" or "City Engineer" are used in these specifications they refer respectively to the Street Superintenden or the City Engineer of the City of Elsinore or their authroized agents or inspectors. Plans; Whenever the term "Plans" is used it shall be held to mean all drawings whatsoever especially prepared for each project on file in the office of the City Engineer, in accordance with which shall, during its progress and on its completion, conform to, It. B. Ta for President nom" o�I—e oar of Truees of the City of Elsinore, California. STATE OF CALIFORNI&) COUNTY OF RIIERSIDE)ss. CITY OF ELSINORE ) I. William Herbert, City Clerk and Ex- Officio Clerk of the Board of Trustees of the City of Elsinore, do hereby certify that the foregoing specifications No. 5 were adopted by the Board of Trustees of said City, at a regular meeting thereof held on the 24th of September, 1924. William Herbert City Clerk o e 01ty Or EISInore,