This section is from the book "Cement And Concrete", by Louis Carlton Sabin. Also available from Amazon: Cement and Concrete.

The modulus of elasticity of twelve-inch mortar cubes, one volume cement to one volume sand, was, for loads between five hundred and one thousand pounds per square inch, 3,461,000 at seven days and 5,000,000 at seventy-five days.

Metal Companies is given in Table 145. The results are seen to be low, as is the crushing strength. The permanent set in five-inch gaged length for a load of six hundred pounds per square inch is also shown in the table.

Tests of Twelve-inch Cubes, Three Months Old, at Watertown Arsenal.

Portland Cement, Brand. | volume Proportions in Concrete. | Compressive Strength. | Modulus of Elasticity in Thousands, between Loads per Square Inch of | Permanent Set in Five Inch Length after Load of 600 Pounds per Square Inch. | ||||

Pounds per Square Inch. | ||||||||

Cement. | Sand. | Cinders. | 100 and 600. | 100 and 1000. | 1000 and 2000. | |||

A | 1 | 1 | 3 | 2780 | 2500 | 2500 | 1429 | 0.0000 |

B | 1 | 1 | 3 | 2368 | 4167 | 3214 | 1190 | 0.0000 |

B | 1 | 1 | 3 | 2580 | 2083 | 1875 | 1351 | 0.0001 |

C | 1 | 1 | 3 | 1877 | 1667 | 1552 | ... | 0.0001 |

D | 1 | 1 | 3 | 1879 | 2273 | 1875 | ... | 0.0001 |

Mean | 1 | 1 | 3 | 2297 | 2542 | 2203 | ... | 0.0001 |

A | 1 | 2 | 5 | 1715 | 1471 | 1286 | ... | 0.0002 |

A | 1 | 2 | 5 | 1402 | 1087 | 957 | ... | 0.0008 |

B | 1 | 2 | 5 | 1263 | 1087 | 865 | ... | 0.0024 |

B | 1 | 2 | 5 | 1200 | 1190 | 849 | ... | 0.0009 |

C | 1 | 2 | 5 | 917 | 735 | ... | ... | 0.0057 |

C | 1 | 2 | 6 | 871 | 658 | ... | ... | 0.0113 |

Mean | 1 | 2 | 5 | 1228 | 1038 | ... | ... | 0.0035 |

Note : —Tests for Eastern Expanded Metal Companies. "Tests of Metals," 1898.

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- prev: Art. 56. The Modulus Of Elasticity Of Cement Mortar And Concrete
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