| 释义 |
▪ I. compaction1|kəmˈpækʃən|
[a. OF. compaction, ad. L. compactiōn-em, n. of action f. compingĕre, compact-: see compact v.1]
a. The action or process of making or becoming compact, or of compactly framing or fitting together; the state or condition of being so compacted, consolidation.
1398Trevisa Barth. De P.R. ii. x. (1495) 37 Compaccyon and sadnesse of setes. 1471Ripley Comp. Alch. ii. i. in Ashm. (1652) 135 Ther hard and dry Compactyon. 1577Harrison England ii. iii. (1877) 1. 73 For uniformitie of building, orderlie compaction..the towne of Cambridge exceedeth that of Oxford. 1752Law Spir. Love 1. (1816) 20 How comes the flint to be in such a state of hard dark compaction? 1796Hist. in Ann. Reg. 194 The possession of the Cape and Ceylon..was accounted..a compaction of the maritime dominion of Great Britain.
b. In recent use spec. the action or process of inducing the particles of a substance (as soil, concrete, etc.) to combine more tightly (see quots.). Also attrib.
1926H. D. Hedberg in Bull. Amer. Assoc. Petrol. Geologists X. 1059 In a homogeneous series..the effect of gravitational compaction would be seen in an increase in rock density. 1954Gloss. Highway Engin. Terms (B.S.I.) 16 Compaction, the process whereby soil particles are constrained by rolling or other mechanical means, to pack them more closely together, thus increasing the dry density of the soil. 1956Gloss. Terms Concrete (B.S.I.) 12 Compaction, the process of inducing a closer packing of the aggregate particles in concrete by the reduction of voids. 1959New Scientist 29 Oct. 801/2 Many thousands of soil compaction tests were made.
▪ II. † comˈpaction2 Obs.
[a. OF. compaction (15th c. in Godef.), n. of action from L. compacisci, compact-.]
The making of a compact or agreement; an agreement made, a compact.
a1528Skelton Image Hypocr. Wks. II. 353 His holy actions Be satisfactions Of false compactions. 1534Whitinton Tullyes Offices iii. (1540) 155 If a phicisyon..bynde the pacyent by compactyon that he shall not vse that medicyne any tyme after. 1538–9Instr. Hen. VIII. Visit. Monast. (Hist. Repr. Edin. 1886) 15 Whether the master..doth make any compaction whereby any lucre may ensue to him. |