The invention discloses water-permeable concrete and a concrete pavement construction method thereof. The concrete in per cubic meter is prepared from the following raw materials in parts by weight: 280 to 320Kg of cement, 100 to 140Kg of water, 1200 to 1500Kg of coarse aggregate, 2 to 4Kg of concrete mixing materials and 3 to 5Kg of additives. The water-permeable concrete and the concrete pavement construction method provided by the invention are applied to the water-permeable concrete pavement, so that the pavement has the advantages that the water-permeable performance is good; the bearing force is strong; the service life is long, and the like.

Water-permeable concrete and concrete pavement construction method thereof

The invention discloses a pervious concrete and a construction process thereof. Pebbles, cement, sand, silica powder, water and a water reducer are taken as aggregates of the pervious concrete. The construction process comprises the following steps: preparation before construction, raw material weighing, raw material stirring, transportation, paving and flat vibration, surface layer cleaning, joint treatment and construction completion. By utilizing the scheme, the average relative density of the pervious concrete is 2169Kg/m , the compressive strength is higher than 35MPa, the pervious coefficient of a concrete pavement is higher than 1mm/s, the slump degree is above 120mm, and pumping requirement can be met when required; and meanwhile, the aggregates with large particle sizes and wide application range are utilized, and the silicon rate is controlled, so that the cost of the pervious concrete is relatively low, the construction process is applicable to the construction of pervious concrete pavements, plazas, parking lots and the like, the water permeability of urban pavements can be increased while the structural requirements are met, the urban microclimate can be regulated, and the ecological balance can be kept.

Pervious concrete and construction process thereof

The invention discloses an in-situ testing instrument and testing method for a permeability coefficient of a permeable pavement system and belongs to the technical field of civil engineering. The in-situ testing instrument comprises the pavement system, a basic pipe fitting, a measuring pipe fitting and a water supply system, wherein the basic pipe fitting is vertically mounted in the pavement system, and the bottom end of the measuring pipe fitting is matched and connected with the top end of the basic pipe fitting; the water supply system comprises a water outlet pipe used for supplying water to the measuring pipe fitting, and a valve and a flowmeter are arranged on the water outlet pipe. The testing method comprises steps as follows: water is supplied to the measuring pipe fitting, so that the water reaches an overflow port and is prevented from being overflown, and the seepage flow is acquired through the flowmeter; and the seepage coefficient is acquired by dividing the seepage flow by the discharge area of the basic pipe fitting. In-situ measurement on the pavement is realized, the change of the permeability coefficient of the same location on the permeable pavement can be monitored for years, and a basis is provided for optimization design of the permeable pavement and selection of maintenance methods and opportunities.

In-situ testing instrument and testing method for permeability coefficient of permeable pavement system

The objective of the invention is to provide a method which does not occupy land, is free of pollution to the environment, saves energy and fully utilizes stone wastes to produce a building material. The method comprises the following steps: a, selecting stone wastes with a particle diameter of more than 25 cm and carrying out processing into a stone material used for building, and selecting stone wastes with the particle diameter of 4 to 25 cm and carrying out transporting to a first crusher via a feeding machine; b, transporting the crushed material to a rolling screening machine and carrying out screening; c, allowing the screened material with the particle diameter of less than 1 cm to fall into a second crusher via a transportation belt from the lower part of the rolling screening machine, and allowing the material remained in the rolling screening machine to be used as concrete gravel; and d, transporting the residual stone wastes to the second crusher.

Method for comprehensive utilization of stone wastes

A producing method for producing concrete from mine waste ore and a producing system are disclosed. The producing method includes: smashing the mine waste ore through a smasher, sieving in order, mixing smashed mine waste or powder, mine waste cobbles and mine waste stone sand with coal ash according to a ratio, stirring, adding cement, stirring uniformly, adding a water reducer and polyacrylamide, adding water, and stirring. The producing system comprises the smasher. The smasher, a first sieving machine, a second sieving machine, a third sieving machine and a stirrer are connected in sequence. The third sieving machine is connected to the smasher. The producing method and the producing system are advantaged by reducing the total binding material in the concrete, improving peaceability and pumpability of the concrete, increasing the using amount of the mine waste ore in the concrete, effectively reducing pollutions in a mine area, reducing the risk of mud-rock flows, alleviating grassland desertification processes, and protecting the environment.

A producing method for producing concrete from mine waste ore and a producing system

The invention discloses an ultrahigh strength self-compaction bare concrete for a wind turbine generator tower. The ultrahigh strength self-compaction bare concrete is prepared from the following components: 650-680kg/m3 binding material, 640-680kg/m3 machine-made sand, 980-1020kg/m3 macadam, 7-11kg/m3 water reducer, 6-10kg/m3 enhancing compacting agent, 1-2kg/m3 cellulosic fiber and 115-130kg/m3 water, wherein the binding material contains the following components by dosage per stere (kg/m3): 390-408kg/m3 cement, 35-37kg/m3 micro-bead, 142-149kg/m3 mineral powder, 35-37kg/m3 coal ash and 48-49kg/m3 silica fume. The ultrahigh strength self-compaction bare concrete for the wind turbine generator tower has the advantage that the concrete with strength grade within the scope of C100-C120, self-compaction, pumpability, excellent hook surface crack resistance and fatigue resistance property can be prepared.

Ultrahigh strength self-compaction bare concrete for wind turbine generator tower

The invention discloses a mine mullock pervious concrete which is prepared from the following components in parts by weight: 320-360 parts of cement, 0-80 parts of milled slag, 0-32 parts of silicon ash, 1400 parts of mullock, 2.7-3.0 parts of water reducing agent and 100-120 parts of water. The mine mullock pervious concrete disclosed by the invention has the advantages of high perviousness, favorable economical efficiency and high strength.

Mine mullock pervious concrete and preparation method thereof

The utility model discloses a thermal insulating production system for concrete in a low-temperature area The thermal insulating production system comprises a concrete mixer, wherein a mixing drum is arranged on the concrete mixer; a mixing motor connected with mixing blades in the mixing drum is mounted at the lower part of the mixing drum; electromagnetic heating coils are arranged around the outer side of the drum wall of the mixing drum; a temperature sensor is arranged on the mixing drum; the output end of the temperature sensor is connected with the input end of a controller; the output end of the controller is in controlled connection with each electromagnetic heating coil The thermal insulating production system disclosed by the utility model has the advantages that the thermal insulating production system still can normally construct in the low-temperature area and is not influenced by the low temperature, so that the working efficiency is improved, in addition, the production cost is low

Thermal insulating production system for concrete in low-temperature area

The invention discloses modified high-sulfate-resistant corrosion-resistant concrete comprising cement, fly ash, mineral powder, silica fume, sand, stones, a new high performance admixture and water; and the modified high-sulfate-resistant corrosion-resistant concrete has the advantages of low cost, wide applicability and good sulfate-resistant performance.

Zhu Yanning

Papers

Ultrahigh strength self-compaction bare concrete for wind turbine generator tower

Mine mullock pervious concrete and preparation method thereof

Thermal insulating production system for concrete in low-temperature area

A producing method for producing concrete from mine waste ore and a producing system

Modified high-sulfate-resistant corrosion-resistant concrete