chemical industries ltd or 34 p 502 34 made by mitsui saiamitto co ltd was added after mixing the concrete mix was tested for slump and air content at certain time intervals the results are shown in table 5 table 5__________________________________________________________________________change with time in consistencykind ofname of amount ofadmix admix admixture slump cm air content ture ture kg cm sup 3 0 min 5 min 15 min 0 min 5 min 15 min __________________________________________________________________________base concrete 8 0 6 5 5 2 4 6thick sand 0 2 0 5eninglock 0 1 2 0 1 0agentp 502 1 0 5 0 5 0 5 0 4 6 2 8 0 5 5 5 4 0__________________________________________________________________________ the concrete mix incorporated with the thickening agent was found after hardening to have slightly increased in strength as compared with the control as shown in table 6 the concrete mix having a slump value lower than 3 cm can be used for slip form construction which does not need the fixing of framework table 6______________________________________compressive strength amount of compressivekind of name of admixture strengthadmixture admixture kg m sup 3 kg m sup 3 ______________________________________base concrete 325thickening sandlock 0 1 329agent______________________________________ as mentioned above example 1 demonstrated the following effects when the consistency of ready mixed concrete is adjusted.