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Concrete Construction Techniques
            58  CHAPTER THREE












                                                     SMALL
                                                     STONES


















                                                SPECIAL
                                                REBAR
                                                                                 BROKEN FACE
                                                SUPPORTS
                                                                                 SHELL OF CMU












                              FIGURE 3-18

                             Reinforcing bar supports.

                            begin work. Keep the sand pile covered with a sheet of plastic when
                            you’re not working to minimize moisture evaporation.

                            3.5.1 Hand Mixing
                            If you need less than a cubic yard of concrete, or if ready-mix concrete
                            is not available at the job site, you can mix your own concrete. For very
                            small projects, like setting a post or doing minor repairs, it’s easiest to



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