Arizona republican., 1921-05-15
WORKONCOUNTY
 ROADS G0ES LIN NlGHT AND DAY
There Is No Night" Where. Highway Crews Are Engaged In Laying Concrete Pavement

@tt~ NouuAry III the EOWler Setup or the county highway program is in one respect. at least, like region de- scribed in Revelations, in that there IS no night there. Road building is solng on by day and by night, much the same. with the difference that more concrete is laid in the night shift than in the day shift. The men work better and more cheerfully in the light of the acetylene flares than under the burning rays of a May sun and concrete under those night con- dltions is better laid.
 A reporter for The Republican in the company of Chief Engineer Per kins visited the road making oper- ations last night on the Buckeye road a mile east and a mile south of the Fowler station, whence the cement, aggregate and sand, IS distributed by the industrial railway to the mixers within radius of several miles. From long distance the acetylene lamps may be seen and the clanking of the mixers and the roar of the industrial railway trains as they rush back and forth between the various mixers and the station disturb the night air The lights of the station, too, gieam out in the midnight. 9th CT trains are working at other parts of the industrial railway line taking up the steel ties and rails from parts Of the line where they are no longer needed to more distant points to- ward which the mixers are rapidly making their way.
 Only two of the mixers were then at work. the one on the Buckeye road and the other on the old Mari copa road moving toward Grand ave- nue. Another south of Glendale was temporarily put out of commission by a flood. Somebody turned about 400 inches of water into a newly constructed waste ditch and destroy ea several hundred feet of work on tl@ subgrade. It will take a day or two. for the ground to dry so that work may proceed there. But the time lost will be made up by extra shifts
 Have Fine Organization
 There are two mixers at the Fow- Ter station that have not yet been put into commission. One of them has just been received. There was never a better organization than that which is now hurrying the work along for Twohy Bros. Ehe labor turn over is less than it has been at any time since the work was begun and the men all take a greater interest in-js than they have done before. Each one appears to think that in some way the roads when completed will be a sort of memorial to him self
 The capacity of the mixers is taxed. It is stated that not an inch more of road can be laid within a given time without stealing seconds from the mixer and that the inspec- tors are there to prevent. Experi- ence and tests have shown that the constituent clements of the concrete must remain within the mixer for one minute in order that the neces- sary chemical action may take place Enthusiastic workers anxious to beat a record are tempted now and ther to take a second or more from thai minute
 The night affords better conditions of temperature, and temperature is z factor in concrete work; that is, il the concrete work that is being don' on the county highway. It has fo some time engaged the attention o the engineering department both a. to the set of the cement and as t the expansion and contraction of tn concrete after it is in place. That il something concerning which tn books are silent and the foremost road experts who have visited thi project have learned with the great est interest the results of the expert ments that have been made. In forthcoming article in the Engineer ing Record, the experiments and dis coveries of the county commission engineering department will be de scribed by the assistant editor, N. 4 Bowers. who spent two days in mak ing an investigation in the office of the commission and on the work.
 Temperature a Factor
 It was observed by the engineerin department after the weather bega to grow warm that the tests mad 1 in the laboratory and those conduct ed at the plants gave different re suits. That was correctly attribute to the fact that water of differen temperatures was used, that used 8 the plant being taken from pipes ly ing on the surface. The water wa found to be from so to 100 degree A sresult of the use of water unde these conditions was that the ce ment set too quickly. Accordingly, meet this condition the Riversid Cement company was ordered change the character of the cenief so as to overcome the effect of tn high temperature of water, and tn; has been done.
 The concrete taken from places inc roads that have been broken
 found by experts to be the heavie and hardest within their experienc That accounts for the greater bucl ,cfn