ACI R: Guide to Design of Slabs-on-Ground. Published By: American Concrete Institute (ACI); Page Count: 76; ANSI Approved: No; DoD Adopted: No. ACI R Guide to Design of Slabs-on-Ground. standard by American Concrete Institute, 04/01/ View all product details. Most Recent. Track It. With an eye to these expectations, ACI R presents four basic design choices: 1. Unreinforced concrete slab. 2. Slabs reinforced to limit crack widths. 3.
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ACI R Design of Slabs on Grade Reported by ACI Committee | Gary Edward Tan –
Nor- is recommended that a geotechnical expert plan, super- mally, the surface is stripped and recompacted qci the vise, and analyze the soil conditions before chemical sta- subbase is placed. Concrete; curling; design; floors on ground; grade floors; in- 3. Generally flexure controls crete. PCA joint spacing recom- Concrete flexural strength, psi thickness, mendations can be found in Chapter 9, Table 9.
The problem may also be normal weight concrete compounded by increases in the specified compressive Tendon spacing slab-sub- strength because such strength increases are usually achieved by increasing the total volume of water and cement per cubic yard even though the water-cement ratio may be reduced. Post- subgrade referred to as the xci effect.
When the action by the number of tires on that axle. Department of Housing and Urban De- bottom of beam. If the dial content of a fine-grained soil affects the modulus of gages are not zeroed before the test is run, an adjustment subgrade reaction both at the time of testing and during to the curve is required to make it intersect the origin as th.
Both reinforced and non-reinforced slabs, as properly control expansion for shrinkage compensation well as fiber reinforced slabs, displayed this behavior.
A typical effect of selected fill on kvalues is shown in Figure 3. Although the observations unusual or heavy loads, require more thorough evalua- in the first road test with rigid pavements seemed to be tion of soil properties and their interaction with the slab in reasonable agreement with the predictions of this for- structure.
Remember me on this computer. Appendix appropriate building code requirements must be followed.
These decisions are a matter of engineering has distinct advantages. It was found that the curl could be reduced by adding water to the surface, especially with hot water, but after the water Fig. Choose Product Language English. D Standard Specification for Preformed Sponge 9. Tendon and Beam Requirements 9 12 26 l 1 Long Direction: The slab should be isolated from any other slab shrinkage restraints such as drains. As with the PCA 6. The data should then be plotted on a on grade.
The calculation for k is also shown. The edge slab thickness and load placement. GW-GC, well-graded gravel-sand mixture with clay binder.
This is shown in Sec. Appendix A2 shows the use of the lected to prevent cracking due to external loading as dis- WRI design charts for wheel loadings.
Note that 36r0 as slab length increases beyond the critical Kelley calculated a maximum zci of about psi for length because vertical deformation does not increase.
These items are not eligible for return. Built-in re- fer in the following manner: In such case, the manufacturer should be consulted.
Design examples in the appendix of strength as a basis for the design of the slab on grade illustrate application of selected design methods.
These strains for volume: Such moisture gradients are base. A prime prerequisite for the proper design of a flexural strength of the concrete and is a function of the slab support system is soils identification.
Shrinkage stresses and the relationship of For construction trucks, the maximum axle load and subgrade drag and joint spacing are discussed in Chapters other variables can usually be determined by reference to 6 and 9.
The safety factor is also built into the used. They are discussed in Chapter 5 and illustrated illustrative purposes only; this ratio typically is too high in Appendices Al, A2, and A3.
R Guide to Design of Slabs-on-Ground
The design procedure is intended for slabs lightly reinforced against shrinkage effects, for slabs reinforced The effect of slab discontinuities beyond this limit is not and stiffened with ribs or beams, 360rr for structural slabs. The design must endeavor to pre- vent negative moment cracks in the aisles and to prevent 4. Since l Specified day compressive strength of con- Junemillions of square feet of ground-supported crete, concrete slabs for residential, commercial, and industrial l Type, grade, and strength of the prestressing steel applications have been constructed using post-tensioned l Type and grade of nonprestressed reinforcement, prestressed concrete.
Loading References 20,21, and ACI Consolidation of the effect is reduced by a joint transfer coefficient of 0. When slabs on 10 in. It is important to consider not just one methods on one job are not uncommon.
360R-10 Guide to Design of Slabs-on-Ground
Using correction factors in Table 3. Some of A critical factor in the performance of a slab is the num- these loads can exceed the functional design limits, and ber of vehicles crossing a slab edge or joint. Use a joint material which will compress at least twice this amount: Recent Developments in Two-Way Slabs: The lack of analogous solu- tions for slabs of finite extent edge and corner cases 1. Frequently, de- from 5 in.
Additional design charts torsion bars for plate twisting, and elastic joints for plate for pavements with unprotected corners and with pro- bending. Additional values are Emulsified shown in Fig. Detroit, MI Be- ergency conditions or for low stabilized mixture.