Calculating device

Claim 2

A calculator useful in the determination of portions of ingredients for concrete mixes comprising a body member; a slide member slidably positioned within said body member, said slide member and body member having linear scales extending therealong, said linear scales being coextensive with one another and having the same spacing and range; a set of at least three concrete mix factor scales positioned on said members, said concrete mix factor scales including a total percent of air in concrete for aggregate volume scale (12); an amount of mixing water for aggregate volume scale (13) and a number of sacks of cement for aggregate volume scale (14), said amount of mixing water scale (13) and number of sacks of cement scale (14) carried on one member and said total percent of air scale (12) carried on said other member, said concrete mix factor scales being positioned on the calculator so as to facilitate the determination of the volume of the fine and coarse aggregate of the concrete mix to be read on the linear scale of one of the members; and a cursor mounted on said body member.

Claim 3

The calculator of claim 1 wherein said concrete mix factor scales are positioned on the calculator in accordance with the equation ft.3 of aggregate 27 - (ft.3 of H2O + ft.3 of air + ft.3 of cement).

Claim 4

The calculator of claim 1 also including a maximum coarse aggregate for entrapped air scale (20), said entrapped air scale (20) being positioned on the same member of the calculator as the total percent of air scale (12) so as to facilitate the determination of the percent of entrapped air content of a non-air-entraining mix to be read on the total percent of air scale (12) knowing the size of the coarse aggregate.

Claim 5

The calculator of claim 1 also including a maximum coarse aggregate for total air scale (21), said coarse aggregate scale (21) being positioned on the same member of the calculator as the total percent of air scale (12) so as to facilitate the determination of the total percent of air content of air-entrained concrete to be read on the total percent of air scale (12) knowing the size of the coarse aggregate.

Claim 6

A calculator useful in the determination of portions of ingredients for concrete mixes comprising a body member; a slide member slidably positioned within said body member, said slide member and body member having linear scales extending therealong, said linear scales being coextensive with one another and having the same spacing and range; a set of at least two concrete mix factor scales positioned on said members, said concrete mix factor scales including a coarse aGgregate size for the fineness modulus of the combined aggregate scale (15) and the number of sacks of cement for the fineness modulus of the combined aggregate scale (16), each of said concrete mix factor scales being positioned on a different member of the calculator so as to facilitate the determination of the fineness modulus for the combined aggregate to be read on the linear scale of one of the members; and a cursor mounted on said body member.

Claim 7

A calculator useful in the determination of portions of ingredients for concrete mixes comprising a body member; a slide member slidably positioned within said body member, said slide member and body member having linear scales extending therealong, said linear scales being coextensive with one another and having the same spacing and range; a set of at least two concrete mix factor scales positioned on said members, said concrete mix factor scales including a coarse aGgregate size for the fineness modulus of the combined aggregate scale (15) and the number of sacks of cement for the fineness modulus of the combined aggregate scale (16), each of said concrete mix factor scales being positioned on a different member of the calculator so as to facilitate the determination of the fineness modulus for the combined aggregate to be read on the linear scale of one of the members; and a cursor mounted on said body member.

Claim 8

The calculator of claim 5 wherein said concrete mix factor scales are positioned on the calculator in accordance with the equation F.M. (combined aggregate) K + 0.1C where F.M. fineness modulus, K a constant for a given nominal size of coarse aggregate, and C cement content in sacks per unit volume.

Claim 9

A calculator useful in the determination of portions of ingredients for concrete mixes comprising a body member; a slide member slidably positioned within said body member, said slide member and body member having linear scales extending therealong, said linear scales being coextensive with one another and having the same spacing and range; a set of at least two contrete mix factor scales positioned on said members, said concrete mix factor scales including a coarse aggregate for the apparent volume of coarse aggregate per unit volume of concrete scale (17) and a fineness modulus of sand for the apparent volume of coarse aggregate per unit volume of concrete scale (18), each of said concrete mix scales being positioned on a different member of the calculator so as to facilitate an automatic determination of the apparent volume of coarse aggregate per unit volume of concrete to be read on the linear scale of one of the members; and a cursor mounted on said body member.

Claim 10

A calculator useful in the determination of portions of ingredients for concrete mixes comprising a body member; a slide member slidably positioned within said body member, said slide member and body member having linear scales extending therealong, said linear scales being coextensive with one another and having the same spacing and range; a set of at least two contrete mix factor scales positioned on said members, said concrete mix factor scales including a coarse aggregate for the apparent volume of coarse aggregate per unit volume of concrete scale (17) and a fineness modulus of sand for the apparent volume of coarse aggregate per unit volume of concrete scale (18), each of said concrete mix scales being positioned on a different member of the calculator so as to facilitate an automatic determination of the apparent volume of coarse aggregate per unit volume of concrete to be read on the linear scale of one of the members; and a cursor mounted on said body member.

Claim 11

The calculator of claim 7 wherein said concrete mix factor scales are positioned on the calculator in accordance with the equation b/bo K + 0.1 F.M. (sand) where F.M. fineness modulus, K a constant for a given nominal size of coarse aggregate, and b/bo apparent volume of coarse aggregate per unit volume of concrete.

Claim 12

A calculator useful in the determination of portions of ingredients for concrete mixes comprising a body member; a slide member slidably positioned within said body member, said slide member and body member having logarithmic scales extending therealong, said logaritymic scales being coextensive with one another and having the same spacing and range; a set of at least three concrete mix factor scales positioned on said members, said concrete mix factor scales including a slump for the volume of mixing water scale (22), an angular or round aggregate water index for the volume of mixing water scale (23) and a coarse aggregste size for the volume of mixing water scale (24), said water index scale (23) and coarse aggregate size scale (24) carried on one member and said slump for water scale (22) carried on said other member, said concrete mix factor scales being positioned on the calculator so as to facilitate the determination of the volume of mixing water for the concrete to be read on the logarithmic scale of one of the members; and a cursor mounted on said body member.

Claim 13

A calculator useful in the determination of portions of ingredients for concrete mixes comprising a body member; a slide member slidably positioned within said body member, said slide member and body member having logarithmic scales extending therealong, said logaritymic scales being coextensive with one another and having the same spacing and range; a set of at least three concrete mix factor scales positioned on said members, said concrete mix factor scales including a slump for the volume of mixing water scale (22), an angular or round aggregate water index for the volume of mixing water scale (23) and a coarse aggregste size for the volume of mixing water scale (24), said water index scale (23) and coarse aggregate size scale (24) carried on one member and said slump for water scale (22) carried on said other member, said concrete mix factor scales being positioned on the calculator so as to facilitate the determination of the volume of mixing water for the concrete to be read on the logarithmic scale of one of the members; and a cursor mounted on said body member.

Claim 14

The calculator of claim 9 wherein said concrete mix factor scales are positioned on the calculator in accordance with the equation M.W. (round aggregate) K (Slump + 24) where M.W. volume of mixing water, Slump measure of consistency or wetness of the cement mixture, and K a constant for a given size aggregate.

Claim 15

The calculator of claim 9 wherein said concrete mix factor scales are positioned on the calculator in accordance with the equation M.W. (angular) K (Slump + 24)/1.1 where M.W. volume of mixing water, Slump measure of consistenty or wetness of the cement mixture, and K a constant for a given size aggregate.

Claim 16

A calculator useful in the determination of portions of ingredients for concrete mixes comprising a body member; a slide member slidably positioned within said body member, said slide member and body member having logarithmic scales extending therealong, said logarithmic scales being coextensive with one another and having the same spacing and range; a set of at least three concrete mix factor scales positioned on said members, said concrete mix factor scales including a percent of entrained air for strength scale (27), a coarse aggregate size for strength scale (28) and a water/cement ratio for strength scale (30), said coarse aggregate scale (28) and water/cement ratio sacle (30) carried on one member and said percent of entrained air scale (27) carried on the other member, said concrete mix factor scales being positioned on the calculator so as to facilitate the determination of the compressive strength of the concrete to be read on the logarithmic scale of one of the members; and a cursor mounted on said body member.

Claim 17

A calculator useful in the determination of portions of ingredients for concrete mixes comprising a body member; a slide member slidably positioned within said body member, said slide member and body member having logarithmic scales extending therealong, said logarithmic scales being coextensive with one another and having the same spacing and range; a set of at least three concrete mix factor scales positioned on said members, said concrete mix factor scales including a percent of entrained air for strength scale (27), a coarse aggregate size for strength scale (28) and a water/cement ratio for strength scale (30), said coarse aggregate scale (28) and water/cement ratio sacle (30) carried on one member and said percent of entrained air scale (27) carried on the other member, said concrete mix factor scales being positioned on the calculator so as to facilitate the determination of the compressive strength of the concrete to be read on the logarithmic scale of one of the members; and a cursor mounted on said body member.

Claim 18

The calculator of claim 12 wherein said concrete mix factor scales are positioned on the calculator in accordance with the equation SC28 1,000K1og1 (12.893 - W/C/10 ) (100 - 5ac/100 ) where SC28 compressive strength after 28 days, W/C water-cement ratio, ac entrained air content in percent, and K a constant for a given coarse aggregate size.

Claim 19

A calculator useful in the determination of portions of ingredients for concrete mixes conprising a body member; a slide member slidably positioned within said body member, and slide member and body member having logarithmic scales extending therealong, said logarithmic scales being coextensive with one another and having the same spacing and range; a set of at least two concrete mix factor scales positioned on said members, said concrete mix factor scales including a percent entrained air for water reduction scale (31), and the number of sacks of cement for water reduction (32), each of said concrete mix factor scales being positioned on different members of the calculators so as to facilitate the determination of the amount of reduction in the mixing water content for air-entrained concrete to be read on one of the logaritymic scales of one of the members; and a cursor mounted on said body member.

Claim 20

A calculator useful in the determination of portions of ingredients for concrete mixes conprising a body member; a slide member slidably positioned within said body member, and slide member and body member having logarithmic scales extending therealong, said logarithmic scales being coextensive with one another and having the same spacing and range; a set of at least two concrete mix factor scales positioned on said members, said concrete mix factor scales including a percent entrained air for water reduction scale (31), and the number of sacks of cement for water reduction (32), each of said concrete mix factor scales being positioned on different members of the calculators so as to facilitate the determination of the amount of reduction in the mixing water content for air-entrained concrete to be read on one of the logaritymic scales of one of the members; and a cursor mounted on said body member.

Claim 21

The calculator of claim 14 where said concrete mix factors are positioned on the calculator in accordance with the equation W.R. 1.02 (A - 0.9).55 X Tan (19.7 + 10 (7-C)) */Tan 19.7* ) where A entrained air content in percent and C cement content in sacks per unit volume.

Claim 22

A calculator useful in the determination of portions of ingredients for concrete mixes comprising a body member; a slide member slidably positioned within said body member, said slide member and body member having logarithmic scales extending therealong, said logarithmic scales being coextensive with one another and having the same spacing and range; a set of at least three concrete mix factor scales positioned on said members, said concrete mix factor scales including a fineness modulus for percent sand scale for percent sand (33), a number of sacks of cement for percent sand scale (34) and a size of coarse aggregate for percent sand scale (35), said number of sacks of cement scale (34) and size of coarse aggregate scale (35) carried on the same member and said fineness modulus for percent sand scale (33) carried on the other member, said concrete mix factor scales being positioned on the calculator so as to facilitate the determination of the percent sand contained in the total amount of aggregate mixTure to be read on the logarithmic scale of one of the members; and a cursor mounted on said body member.

Claim 23

A calculator useful in the determination of portions of ingredients for concrete mixes comprising a body member; a slide member slidably positioned within said body member, said slide member and body member having logarithmic scales extending therealong, said logarithmic scales being coextensive with one another and having the same spacing and range; a set of at least three concrete mix factor scales positioned on said members, said concrete mix factor scales including a fineness modulus for percent sand scale for percent sand (33), a number of sacks of cement for percent sand scale (34) and a size of coarse aggregate for percent sand scale (35), said number of sacks of cement scale (34) and size of coarse aggregate scale (35) carried on the same member and said fineness modulus for percent sand scale (33) carried on the other member, said concrete mix factor scales being positioned on the calculator so as to facilitate the determination of the percent sand contained in the total amount of aggregate mixTure to be read on the logarithmic scale of one of the members; and a cursor mounted on said body member.

Claim 24

The calculator of claim 16 wherein said concrete mix factor scales are positioned on the calculator in accordance with the equation % Sand (round aggregate) 1.000K1 ((22-C)/18 ) ((FMs + K2)/(2.65 + K2)) where C cement sacks per unit volume, FMs fineness modulus of sand, and K1 and K2 are constants at any given size of coarse aggregate.

Claim 25

The calculator of claim 16 wherein said concrete mix factor scales are positioned on the calculator in accordance with the equation % Sand (angular aggregate) 1.175K1 ((27-C)/23 ) ((FMs + K2)/(2.65 + K2)) where C cement in sacks per unit volume, FMs fineness modulus of sand, and K1 and i K2 are constants at any given size of coarse aggregate.

Claim 26

A calculator useful in the determination of portions of ingredients for concrete mixes comprising a body member; a slide member slidably positioned within said body member; said slide member and body member having linear scales extending therealong, said linear scales being coextensive with one another and having the same spacing and range; a set of at least three concrete mix factor scales positioned on said members, said concrete mix factor scales including an amount of water for unit weight scale (36), a number of sacks of cement for unit weight scale (37) and a unit weight scale (38), said water scale (36) and unit weight scale (38) carried on the same member and said cement scale (37) carried on the other member, said concrete mix factor scales being positioned on the calculator so as to facilitate the determination of the weight of the concrete to be read on the linear scales of one of the members; and a cursor mounted on said body member.

Claim 27

A calculator useful in the determination of portions of ingredients for concrete mixes comprising a body member; a slide member slidably positioned within said body member; said slide member and body member having linear scales extending therealong, said linear scales being coextensive with one another and having the same spacing and range; a set of at least three concrete mix factor scales positioned on said members, said concrete mix factor scales including an amount of water for unit weight scale (36), a number of sacks of cement for unit weight scale (37) and a unit weight scale (38), said water scale (36) and unit weight scale (38) carried on the same member and said cement scale (37) carried on the other member, said concrete mix factor scales being positioned on the calculator so as to facilitate the determination of the weight of the concrete to be read on the linear scales of one of the members; and a cursor mounted on said body member.

Claim 28

A calculator useful in the determination of portions of ingredients for concrete mixes comprising a body member; a slide member slidably positioned within said body member, said slide member and body member having linear scales extending therealong, said linear scales being coextensive with one another and having the same spacing and range; at least one concrete mix factor scale positioned on said members, said concrete mix factor scale including an aggregate specific gravity for aggregate weight scale (39) carried on the slide member so as to determine the weight of aggregate on sand for the concrete mix knowing the volume of coarse aggregate or sand, respectively, to be used, said weight to be read on the logarithmic scale of one of the members; and a cursor mounted on said body member.

Claim 29

A calculator useful in the determination of portions of ingredients for concrete mixes comprising a body member; a slide member slidably positioned within said body member, said slide member and body member having linear scales extending therealong, said linear scales being coextensive with one another and having the same spacing and range; at least one concrete mix factor scale positioned on said members, said concrete mix factor scale including an aggregate specific gravity for aggregate weight scale (39) carried on the slide member so as to determine the weight of aggregate on sand for the concrete mix knowing the volume of coarse aggregate or sand, respectively, to be used, said weight to be read on the logarithmic scale of one of the members; and a cursor mounted on said body member.