摘要:
The present invention provides a method of producing a storable bituminous coated material suitable for use as foothpath and/or carriageway material in a wearing course, basecourse and/or roadbase. The method comprises providing coarse and fine aggregate particles and mixing at least one of the coarse and fine aggregate particles with hot bitumen or bitumen emulsion in which the bitumen is a hard grade bitumen, and mixing the coated coarse and fine aggregate particles, in the absence of soft grade bitumen, with a slow breaking bitumen emulsion in which the bitumen is a hard grade bitumen.
摘要:
An apparatus (10) for moulding a staircase comprising a plurality of modules (11-13), each module comprising tread (14) and riser (15) mould parts secured together at, and extending one to each side from, a connection point (18) with a fixed angle of between 0° and 15° between the tread (14) and riser (15), the length of each tread and riser from the connection point (18) being adjustable, and each module (11-13), comprising an individual liner (45) which extends over the tread (14) and riser (15) to cover the tread (14) and riser (15) and there being means (46) located in a space between the tread (14) and riser (15) to maintain the liner (45) taut, the apparatus (10) further comprising a support structure (35) on which the modules (11-13) are mounted generally in a line, there being means to enable the modules (11-13) to be moved along the support structure (35) and to vary the spacing between the modules (11-13) of the mould (10).
摘要:
An apparatus for moulding a staircase includes a plurality of tread and riser mould part assemblies (14) arranged along the apparatus (10), each tread mould part (24) of each assembly (14) extending downwardly from a connection (26) with the riser mould part (25) of the assembly (14), which riser mould part (25) also extends downwardly at an opposite side of the connection (26), the lengths of each of the tread and riser mould parts (24, 25) from their respective connections (26) being adjustable, and the apparatus (10) further including a support structure (16, 17) characterised in that the tread mould part (24) of a first assembly (14) and the riser mould part (25) of an adjacent second assembly (14) are connected to a first bogie means (40) which is movable along the support structure (16, 17) of the apparatus (10), and the riser mould part (25) of the first assembly (14) and the tread mould part (24) of a third adjacent assembly (14) are connected to a second bogie means (41) which is movable along the support structure (16, 17) of the apparatus (10), the lengths of the tread and riser mould parts (24, 25) of the first assembly (14) and of the riser mould part (25) of the second assembly and of the tread mould part (24) of the third assembly (14) being adjustable as the first and second bogie means (40, 41) are moved towards or away from one another.
摘要:
A method of manufacturing a tunnel (10) or shaft lining or pipeline of segments (12), wherein each segment (12) comprises a concrete body (11) having an extrados (13) surface, an intrados (14) surface and first and second ends (15, 16) and first and second sides (17, 18), the ends (15, 16) and sides (17, 18) providing edge portions, the segments (12) being adapted to be connected to further similar segments (12) with edge portions adjacent edge portions of adjacent segments (12), the method being characterised in that the method includes enveloping the ends (15, 16) or sides (17, 18) of at least a pair of segments (12) in a reinforcing material as the concrete is cast, and once the concrete has cured, connecting the segments (12) together with one of each of their enveloped ends (15, 16) or sides (17, 18) adjacent, and sealing between the enveloped ends or sides.
摘要:
A moulding apparatus (10) for moulding articles (50) in a settable material, the moulding apparatus (10) including primary part (11) having a base (14) and one or more mould edges. The apparatus (10) is characterised in that it includes at least one insert (20, 21) which is arranged to extend along a mould edge to provide with the primary part (11) a moulding recess (12) into which moulding material is introduced, the insert (20, 21) having a surface (28) which faces inwardly of the moulding recess (19) which is configured so that an edge of the article (50) moulded in the moulding apparatus (10) is provided with a desired formation (25, 26), the insert (20, 21) being removable from the primary part (11) with the moulded article (50).
摘要:
A mastic product comprising bitumen, filler and aggregate is prepared by introducing into a mixer aggregate in an unheated and undried condition and with a water content controlled to be at least about 3 % by weight by reference to the total mastic composition, adding all the required bitumen at elevated temperature while the mixer is in operation, subsequently adding the required filler in an unheated condition and continuing mixing operation whilst allowing the mixture to cool, to produce a granular product. The moisture content is controlled so as to provide sufficient 'lubrication' for which a minimum input of about 3 % is appropriate, and the maximum water input should preferably not exceed about 7 % because of potential problems at the point of use. Water may be added to, or drained from, the aggregate before or after it is introduced into the mixer in order to maintain a designed mean water content in the final product of about 3.5 % and typically a maximum of 4 %.
摘要:
An apparatus (10) for moulding a staircase comprising a plurality of modules (11-13), each module comprising tread (14) and riser (15) mould parts secured together at, and extending one to each side from, a connection point (18) with a fixed angle of between 0 DEG and 15 DEG between the tread (14) and riser (15), the length of each tread and riser from the connection point (18) being adjustable, and each module (11-13), comprising an individual liner (45) which extends over the tread (14) and riser (15) to cover the tread (14) and riser (15) and there being means (46) located in a space between the tread (14) and riser (15) to maintain the liner (45) taut, the apparatus (10) further comprising a support structure (35) on which the modules (11-13) are mounted generally in a line, there being means to enable the modules (11-13) to be moved along the support structure (35) and to vary the spacing between the modules (11-13) of the mould (10).
摘要:
A method is described of checking the slump value of a ready-mix concrete load at the point of delivery in a delivery vehicle (10) of the kind having a rotatable drum (11) in which the concrete load is contained. The method comprises determining a measure of the work required to rotate the drum (11) to produce first data, transmitting information to a base (16), the information dependant upon the first data, determining the slump value of the concrete load from the first data either at the point of delivery or from the transmitted information at the base (16) and storing the information or the slump value at the base (16) whereby an independent record of the slump value of the concrete load at the point of delivery is made at the base (16).
摘要:
A track (10) for railway type vehicles includes a foundation (11), a track pavement (12) on the foundation (11), and a pair of rails supported by the track pavement (12), characterised in that the track pavement (12) includes a plurality of pre-formed sections (13) laid end to end and connected together.
摘要:
A method is described of checking the slump value of a ready-mix concrete load at the point of delivery in a delivery vehicle (10) of the kind having a rotatable drum (11) in which the concrete load is contained. The method comprises determining a measure of the work required to rotate the drum (11) to produce first data, transmitting information to a base (16), the information dependant upon the first data, determining the slump value of the concrete load from the first data either at the point of delivery or from the transmitted information at the base (16) and storing the information or the slump value at the base (16) whereby an independent record of the slump value of the concrete load at the point of delivery is made at the base (16).