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hollow blocks

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Journal Article
Published: 01 February 2006
Quarterly Journal of Engineering Geology and Hydrogeology (2006) 39 (1): 65–72.
...O.E. Alutu; A.E. Oghenejobo Abstract Strength and durability of cement-stabilized laterite hollow blocks made with laterite soils at three different locations in Edo State were studied. To this end, blocks were produced with water content at about the optimum moisture with varying percentages...
FIGURES | View All (5)
Journal Article
Published: 01 December 2005
Earthquake Spectra (2005) 21 (1_suppl): 411–424.
...Mahmoud R. Maheri Roofs covering buildings in the city of Bam, Iran prior to the earthquake of 26 December 2003 can be categorized into three main groups: traditional masonry dome or vault, steel I-beam jack-arch system, and concrete beam-hollow block system. The collapse of nonengineered masonry...
Journal Article
Published: 01 August 1983
Bulletin of the Seismological Society of America (1983) 73 (4): 1139–1159.
... building construction by Yatrik engineers for various government build- ings has extensively used hollow cement concrete blocks (30 x 15 x 15 cm). Some of STUDY OF EARTHQUAKE NEAR GREAT NICOBAR ISLAND~ INDIA 1149 I FIG. 14. Damage to the chimney of a residential building. o. Fro. 15. Lintel failure...
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Published: 01 August 2022
Sprinkler drop Y Sprinkler/other piping Y Electrical distribution Equipment Y Diesel generator Y RCMF: reinforced concrete moment frame; CHB: concrete hollow block; RC: reinforced concrete; Y: flag for component assignment; X: “Remove
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High-density patches of subvertical tentaculitids in plan (bedding plane) view. A) High-density patch of subvertical tentaculitids preserved in mudstone (UWO_Dev_ON_HH-9). This high-density patch was discovered upon preparation of the block illustrated in Figure 3, collected in situ from the Ausable River section, Hungry Hollow, Ontario. The location of the cross-sectional surface illustrated in Figure 3 is indicated by an arrow at the bottom of the photograph. Note: circular features and scratches surrounding the tentaculitid apertures are entirely due to the preparation of the mudstone block. B) Close-up of a patch of subvertical tentaculitids in mudstone block from the south clay quarry, Hungry Hollow, Ontario, showing grid-like spacing pattern of upward-projecting apertural ends (University of Michigan Museum of Paleontology specimen UMMP 73818 collected by John and Michael Topor; photo by John Topor). Note overall tilt of subvertically oriented shells toward the upper right of the photograph. C) Close-up view of the upper surface of a concretion-hosted patch of subvertical tentaculitids UWO_Dev_ON_HH_1) from the south clay quarry, Hungry Hollow, Ontario, showing variation in apertural diameters (highlighted by white circles) and random spacing of individuals.
Published: 18 April 2024
of the mudstone block. B ) Close-up of a patch of subvertical tentaculitids in mudstone block from the south clay quarry, Hungry Hollow, Ontario, showing grid-like spacing pattern of upward-projecting apertural ends (University of Michigan Museum of Paleontology specimen UMMP 73818 collected by John and Michael
Journal Article
Published: 01 November 1986
Quarterly Journal of Engineering Geology and Hydrogeology (1986) 19 (4): 425–431.
.... Florek, A. & Ejeh, S. P. 1985. Soilcrete hollow block as a building unit. Proceedings of the seminar on the use of clay bricks and blocks for the provision of cheaper and durable housing, Zaria. Nigerian Building and Road Research Institute, 136–145. Florek, A. & Ezetah, E. V. 1985. Some...
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Figure 13. Recent topples of large undercut blocks along southeastern shore of Lake McConaughy. A) Large blocks of soft Ash Hollow Formation strata and soil, with intact turf cover, on cliff face at landward terminus of large erosional platform in S½, SW¼ NE¼ NW¼, section 8, T.14N., R.38W. (November 2000; see Figure 10). R. F. D., Jr., is 1.7 m tall. B) Large, undercut block of partially cemented Ash Hollow formation, lying atop previously eroded blocks in SW¼ NW¼ SW¼ SW¼, section 3, T.14N., R.38W. (see Figure 12); Jamie Taylor is 1.55 m tall (August 2002). C) Very large toppled blocks of soft Ash Hollow Formation eroding from WNW-ESE trending headland in S½ NE¼ NW¼ NE¼ and S½ NW¼ NE¼ NE¼, section 12, T.14N., R.39W. (see Figure 10); Jamie Taylor (right foreground) is 1.55 m tall (August 2002). Prominence of mass wasting here probably resulted from coincident orientation of cementation grain and fractures (see Figure 3A and 3B)
Published: 01 January 2004
Figure 13. Recent topples of large undercut blocks along southeastern shore of Lake McConaughy. A) Large blocks of soft Ash Hollow Formation strata and soil, with intact turf cover, on cliff face at landward terminus of large erosional platform in S½, SW¼ NE¼ NW¼, section 8, T.14N., R.38W
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(Upper) Hollowed out sandstone blocks (1 m diameter) from the Cedar Mountain Formation, Moab, Utah (USA). These blocks experience both case hardening of the outer shell and core softening (white arrows) of the block interior. (Lower) Backscatter electron (BSE) image of the Mn–Fe-rich rock varnish that is responsible for case hardening the sandstone blocks. Spalling occurs along the base of the weathering rind where porosity (dark open spaces) is greatest.
Published: 01 June 2017
Figure 2 ( Upper ) Hollowed out sandstone blocks (1 m diameter) from the Cedar Mountain Formation, Moab, Utah (USA). These blocks experience both case hardening of the outer shell and core softening (white arrows) of the block interior. ( Lower ) Backscatter electron (BSE) image of the Mn–Fe-rich
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—View eastward at B (Fig. 1c) of gastropod limestone at top of riser of Sandy Hollow step. Middle and upper parts of gastropod limestone crumpled and slid over its lower layers as overriding block of Sandy Hollow thrust surmounted top of riser.
Published: 01 December 1976
FIG. 7. —View eastward at B ( Fig. 1c ) of gastropod limestone at top of riser of Sandy Hollow step. Middle and upper parts of gastropod limestone crumpled and slid over its lower layers as overriding block of Sandy Hollow thrust surmounted top of riser.
Journal Article
Published: 01 July 2002
Bulletin de la Société Géologique de France (2002) 173 (4): 337–345.
... sub-metric angular blocks. A cave, a few meters deep, comes out the south wall. Bedrocks consist of metagabbros of the Makalondi greenstone belt, a belt of the Palaeoproterozoic Birimian Formations of the West Africa craton [Pouclet et al ., 1990]. The rock has a common granular texture...
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Microbial mat in Unit 2. A) Upper surface of Block A showing wrinkle marks and two intersecting trackways of Diplichnites cuithensis. B) Close-up of wrinkle marks on Block A. C) Upper surface of Block C illustrating concentric wrinkles around a hollow on the sediment surface. D) Close-up of wrinkles on Block C. Green color on views C and D is modern algae.
Published: 01 December 2014
Fig. 5.— Microbial mat in Unit 2. A ) Upper surface of Block A showing wrinkle marks and two intersecting trackways of Diplichnites cuithensis . B ) Close-up of wrinkle marks on Block A. C ) Upper surface of Block C illustrating concentric wrinkles around a hollow on the sediment surface. D
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Photograph and sketch looking south along Twist Canyon (directly south of locality T in Fig. 2A) showing blocks of east-dipping limestone of upper Green River Formation pressed downward into extremely thinned claystone of lower Green River Formation and underlain by thinned Colton Formation. Arapien Shale is exposed beneath these extremely thinned Eocene rocks, and all are separated from light gray, east-dipping pebbly sandstone of the Miocene formation of Black Cap Mountain by a narrow horse block of sandstone and siltstone of the Eocene Crazy Hollow Formation. These Green River and Crazy Hollow rocks are within 200 meters horizontally of exposed, complete sections of equivalent strata, indicating extreme and abrupt thinning as shown in Figure 13.
Published: 01 January 2001
Formation. Arapien Shale is exposed beneath these extremely thinned Eocene rocks, and all are separated from light gray, east-dipping pebbly sandstone of the Miocene formation of Black Cap Mountain by a narrow horse block of sandstone and siltstone of the Eocene Crazy Hollow Formation. These Green River
Journal Article
Published: 01 July 2002
Earthquake Spectra (2002) 18 (1_suppl): 187–224.
... with clay tile l/reinforced concrete slab roof. 9 Solid/hollow cement block masonry in cement mortar with clay tilea/reinforced concrete slab roof. A large number of masonry structures are hybrid in nature (Figures 11-17 through 11-21). For instance, in a typical two-story construction, the older first...
Journal Article
Published: 01 December 2015
Rocky Mountain Geology (2015) 50 (2): 119–151.
... of moderate- to high-angle domino-style fault block rotation. First, the Valley fault splays and Mine Hollow fault accommodated 5 km of extension between 11.8 to 9.16 Ma; then the Valley fault accommodated 10 km offset between 9.16 to <7.57 Ma (likely as recent as 5–4 Ma). Our regional cross section...
FIGURES | View All (13)
Journal Article
Journal: Clay Minerals
Published: 01 September 1998
Clay Minerals (1998) 33 (3): 435–442.
...-size features of bodies for (a) facing bricks; (b) roofing tiles; and (c) lightweight blocks, paving bricks and hollow slabs. GeoRef, Copyright 2004, American Geological Institute. 1998 ...
Journal Article
Published: 01 April 1966
American Mineralogist (1966) 51 (3-4_Part_1): 508–511.
...R. A. Clifton, Jr.; C. W. Huggins; H. R. Shell Abstract The “hollow tube” theory for chrysotile was established when Turkevich and Hiller (1949) published electron micrographs indicating that single fibers were hollow tubes. This theory was further substantiated by the work of Noll et al. (1958...
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The Upper Chalk/Base Palaeogene (Reading Formation) contact at Alum Bay on the Isle of Wight [SZ 200 930] showing: (A) an irregular erosional contact lined with flint blocks and (B) solution hollow infilled with sediment.
Published: 01 March 2001
Fig. 4. The Upper Chalk/Base Palaeogene (Reading Formation) contact at Alum Bay on the Isle of Wight [SZ 200 930] showing: (A) an irregular erosional contact lined with flint blocks and (B) solution hollow infilled with sediment.
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Outline of mine showing haulage levels and undercut (at bottom) for new block cave, event (hollow black circles) and station (filled red squares) locations, and previously mined volume (at top). Event locations for March 2010 are shown.
Published: 01 March 2012
Figure 1. Outline of mine showing haulage levels and undercut (at bottom) for new block cave, event (hollow black circles) and station (filled red squares) locations, and previously mined volume (at top). Event locations for March 2010 are shown.
Journal Article
Journal: Economic Geology
Published: 01 June 1944
Economic Geology (1944) 39 (4): 287–306.
... range in the Glen Dean limestone is from 7 to 20 feet or more downward from the contact with the overlying Pennington shale. The aggregates in the uppermost beds commonly contain chert and are somewhat hollowed as a result of weathering. Those in the lower beds contain no chert, and, where unweathered...
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(A) All measured slickenline sets on C-planes (solid circles) and S-planes (hollow circles). (B) All slip vectors calculated from S-C fabrics (see text for method). (C) Rose diagram of graywacke and greenstone block long-axis trends.
Published: 01 April 2013
Figure 7. (A) All measured slickenline sets on C-planes (solid circles) and S-planes (hollow circles). (B) All slip vectors calculated from S-C fabrics (see text for method). (C) Rose diagram of graywacke and greenstone block long-axis trends.