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Criteria for Selection and Design of Residential Slabs-on-Ground (1968) / Chapter Skim
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III Research Recommendations
Pages 23-28

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From page 23...
... While much work has been done in the field of residential construction, it has hitherto been primarily concerned with solving current problems rather than developing basic data. The recommendations contained and discussed herein represent an effort to direct attention to a research program designed to produce needed data.
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From page 24...
... The PVC meter has been of great help, yet further laboratory and field investigations are needed, to evolve even better and more economical methods of determining whether a particular soil will swell, the amount of swell that can be expected, and whether, under specific climatic conditions, detrimental movement is likely to result. It would provide information relevant to the C-factors shown in Fig.
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From page 25...
... While much is known about the properties of concrete and reinforcement, the available information is primarily related to heavier construction and loadings; little factual knowledge is available concerning the performance of thin, lightly loaded concrete slabs. 3.1 Field Investigation Field investigation of both cracked and unc recked slabs should continue.
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From page 26...
... 3.4 Maximum Deformation of Unreinforced Slabs Research should be conducted to determine the amount of deflection that unreinforced slabs can accommodate without serious cracking. This investigation, starting with uniform contact provided over the entire slab area, should entail inducing differential settlements slowly and in increments until cracks appear-the total investigation procedure and results being related to the creep characteristics of concrete.
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From page 27...
... Such designs as Hollow Box, Inverted Pyramid, and X-Keel deserve consideration for application on the more unstable soils. It appears possible that these slab types could be substituted for structural slabs, if economic advantages can be demonstrated and design procedures established.
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From page 28...
... Use of lightweight aggregates and nylon tendons for prestressed concrete should also be given consideration in any research program relating to use of prestressed concrete for residential slabson- ground. 4.0 PRIOR:[TY Because the objective is to develop a rigorous design procedure for residential slabs-on-ground, it is worth pointing out that the recommendation under 3.1, pp.
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Key Terms

  • prestressed concrete
  • field investigation
  • field investigations
  • residential slabs
  • unreinforced slabs

  • volume change
  • stabilized soil
  • cement association
  • differential settlements
  • actual performance

  • soil mats
  • potential advantages
  • granular mats
  • partition loads
  • design procedures

  • portland cement
  • steel ratios
  • specific climatic
  • factual knowledge
  • devise standard

  • solving current
  • inducing differential
  • closely associated
  • procedures established
  • temperature ranges

  • entail inducing
  • little factual
  • herein represent
  • careful observation
  • site conditions


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