Method for producing a fibre concrete slab for paving low-traffic roads, concrete slab, and method for paving low-traffic roads

Abstract

The invention relates to a method for paving low-traffic roads or paths with a paving slab that is cast in situ and has a width Dx narrower than the smaller value of D1 and D2, wherein D1 is the free distance between the front wheels of a standard haulage truck and D2 is the distance separating the wheels of the rear-wheel train, being the length of the paving slab Lx shorter than the value of the length L of the free distance between the front axle and the first rear axle of the wheel train of the standard haulage truck, such that the dimensions Dx and Lx mean that a single wheel or, alternatively, a single wheel train of the standard truck is always supported by the paving slab, touching same. The method comprises the steps of: providing for paving either a low-traffic road which has neither asphalt or concrete paving, or a low-traffic path; evening out and levelling the road or path to be paved; determining the width and length of the paving slab and establishing the thickness thereof in accordance with the amount of traffic and the traffic load, the bearing capacity of the natural ground, the strength of the concrete, the residual strength thereof and the climate, such that the thickness is between 5 and 15 cm; determining the amount of fiber required for a required design residual strength of between 10% and 50% of the maximum strength of the concrete; and preparing the mixture of concrete and fibers which are selected from steel, glass, polypropylene, carbon or another structural fiber for concrete. In addition, the method comprises pouring the mixture of fiber concrete directly onto the road or path to be paved according to

1 . Method for paving low-traffic roads or paths with a paving slab that is cast in situ, where the said slab has a width Dx narrower than the smaller value of D1 and D2, being D1 the free distance between the front wheels of a standard haulage truck, and D2 is the free distance separating the wheels of the rear-wheel train, and a length of the paving slab Lx that is shorter than the value of the length L of the free distance between the front axle and the first rear axle of the wheel train of the standard haulage truck, such that the dimensions Dx and Lx mean that a single wheel or, alternatively, a single wheel train of the standard truck is always supported by the paving slab, touching same, CHARACTERIZED in that said method comprises:
 a) providing for paving either a low-traffic road which has neither asphalt or concrete paving, or a low-traffic path;   b) evening out and leveling the road or path to be paved;   c) determining the width of the paving slab Dx;   d) determining the length of the paving slab in a free distance Lx;   e) establishing the thickness thereof in accordance with the amount of traffic and the traffic load, the bearing capacity of the natural ground, the strength of the concrete, the residual strength thereof and the climate, such that the thickness is between 5 and 15 cm;   f) determining the dose of fiber so that the required design strength residual is from 10% to 50% of the maximum strength of the concrete and preparing the concrete mixture by adding fiber, being selected from steel, glass, carbon or polypropylene fibers or some other type of structural fiber for concrete; and if the fibers are plastic fibers, the mixture contains from 1 kg/m3 to 6 kg/m3 (kilograms of fiber per cubic meter of fiber concrete), and if the fibers are metallic fibers, the mixture contains between 15 kg/m3 to 40 kg/m3; and   g) pouring the concrete mixture with fiber directly on the road or path to be paved of the step a) in a paving section of larger size than the measures identified in c) and d), and measuring the paved section to certain measures in steps c) and d); or h) pouring the mixture of fiber concrete directly on the road or path to be paved in step a), in a paving section which has the measures determined in steps c) and d).   
     
     
         2 . Method for paving low-traffic roads and paths with a paving slab, according to  claim 1 , CHARACTERIZED in that a low traffic path comprises a traffic flow of no more than 50 trucks per day. 
     
     
         3 . Method for paving low-traffic roads and paths with a paving slab, according to  claim 1 , CHARACTERIZED in that the minimum value of Dx is greater than 50 cm and the maximum dimension of Dx is equivalent to half the width of the track. 
     
     
         4 . Method for paving low-traffic roads and paths with a paving slab, according to  claim 1 , CHARACTERIZED in that the minimum value of Lx is greater than 50 cm and the maximum dimension of Lx corresponds to 3.0 meters. 
     
     
         5 . Concrete slab for paving low-traffic roads or paths and has a width Dx narrower than the smaller value of D1 and D2, being D1 the free distance between the front wheels of a standard haulage truck and D2 is the free distance separating the wheels of the rear-wheel train; and a length of the paving slab Lx that is shorter than the value of the length L of the free distance between the front axle and the first rear axle of the wheel train of the standard haulage truck, such that the dimensions Dx and Lx mean that a single wheel or, alternatively, a single wheel train of the standard truck is always supported by the paving slab, touching same, CHARACTERIZED in that said slab comprises a mixture of concrete and fiber, being the fibers selected from steel, glass, polypropylene, carbon fibers or some other type of structural fiber for concrete, because if the fibers are plastic fibers, the mixture contains from 1 kg/m3 to 6 kg/m3 (kg of fiber per cubic meter of concrete), and if the fibers are metal fibers, the mixture contains between 15 kg/m3 to 40 kg/m3; and in that the slab thickness is within the range of 5 to 15 cm and the amount of fiber to be added to the mixture should be such that the slab has a residual resistance from 10% to 50% of the maximum strength of the concrete. 
     
     
         6 . Paving slab for paving low-traffic roads or paths according to  claim 5 , CHARACTERIZED in that the minimum value of Dx is higher than 50 cm and the maximum dimension of Dx is equivalent to half the width of the track. 
     
     
         7 . Paving slab for paving low-traffic roads or paths according to  claim 5 , CHARACTERIZED in that the minimum value of Lx is greater than 50 cm and the maximum dimension of Lx corresponds to 3.0 meters. 
     
     
         8 . Paving slab for paving low-traffic roads or paths according to  claim 5 , CHARACTERIZED in that the mentioned concrete slab is suitable for low-traffic roads comprising a circulation of no more than 50 trucks per day. 
     
     
         9 . Manufacturing method of the concrete slab of  claim 5 , which comprises producing a paving slab to be poured in situ, where the said paving slab has a width Dx narrower than the smaller value of D1 and D2, being D1 the free distance between the front wheels of a standard haulage truck and D2 is the free distance separating the wheels of the rear-wheel train; and a length of the paving slab Lx that is shorter than the value of the length L of the free distance between the front axle and the first rear axle of the wheel train of the standard haulage truck, such that the dimensions Dx and Lx mean that a single wheel or, alternatively, a single wheel train of the standard truck is always supported by the paving slab, touching same, CHARACTERIZED in that said method comprises:
 a) determining the width of the slab (Dx) in a free distance Dx,;   b) determining the length of the slab in a free distance Lx;   c) establishing the thickness of the slab, according to the amount of traffic, traffic loads, the bearing capacity of the natural ground, the strength of concrete, the residual strength of concrete and climate; such that the thickness is within the range of 5 to 15 cm;   d) determining the amount of fiber required for a required design residual strength of between 10% and 50% of the maximum strength of the concrete; and preparing the concrete mixture by adding fiber, being selected from steel, glass, polypropylene, carbon fibers or some other type of structural fiber for concrete; and if the fibers are plastic fibers, the mixture contains from 1 kg/m3 to 6 kg/m3 (kilograms of fiber per cubic meter of fiber concrete), and if the fibers are metal fibers, the mixture contains between 15 kg/m3 to 40 kg/m3; and   e) pouring the concrete mixture with fiber directly on the low-traffic road or path to be paved.   
     
     
         10 . Method for manufacturing a concrete slab, in accordance with  claim 9 , CHARACTERIZED in that a low traffic road comprises a circulation of no more than 50 trucks per day.