The invention discloses a lightweight aggregate non-fine concrete and a preparation method thereof. The non-fine concrete is prepared from the following raw materials in proportion by mass: the proportion of cement, coal ash, lightweight aggregate, water to a water reducing agent is equal to 1: (0.00-0.1): (1.50-1.65): (0.25-0.35): (0.008-0.01). The lightweight aggregate non-fine concrete prepared in the invention combines the advantages of lightweight aggregate concrete and non-fine concrete, so that the lightweight aggregate non-fine concrete has the characteristics of light weight, high strength, heat preservation, fire resistance, frost resistance and low heat conductivity, particularly good water permeability and excellent earthquake resistance; and therefore, according to the concrete, the water permeability of a drainage body is enlarged in the construction of a urban drainage system, the noise is reduced, and the earthquake-proof and vibration-isolated system is more superior and has preferable designability.

Lightweight aggregate non-fine concrete and preparation method thereof

The invention discloses an improvement method for enhancing the purifying performance of pervious concrete. The method comprises the following steps: preparing an improved purifying material; determining the mix proportion of the pervious concrete according to the target porosity of ecological pervious concrete; weighing corresponding aggregate, cement, water, a reinforcement agent and a water reducer; weighing the prepared improved purifying material, and replacing parts of the components of the ecological pervious concrete with the improved purifying material in proportion; carrying out first-stage stirring and mixing on the replaced aggregate and water accounting for 30-70% of the total volume of water; adding the replaced cement and the reinforcing agent, and carrying out second-stagestirring; adding the water reducer and the remaining water, and carrying out third-stage stirring to obtain a mixture; charging the mixture in multiple layers, beating the mixture multiple times afterevery charging, manually flattening the mixture, and molding a test piece; and taking the produced pervious concrete test piece, standing the test piece at normal temperature, carrying out demolding,and curing the test piece in a standard curing room. The reinforced pervious concrete made by the method can well purify sewage.

Improvement method for enhancing purifying performance of pervious concrete

The invention discloses a riverway rigidity revetment ecologicalization method. The problem that the daily drainage effect of riverways is weakened when ecological restoration boxes are mounted on revetments is solved. According to the technical scheme, the method mainly comprises the steps that cleaning is conducted; a plurality of parting stops are laid on a slope bank section through cement and divide the slope bank section into a plurality of unit blocks; porous concrete is prepared, a plurality of porous concrete hanging plates are laid, and vine plants are planted on the porous concrete hanging plates; the porous concrete hanging plates are mounted between the two parting stops, located at the joint with a vertical bank section, of the slope bank section; a climbing net is arranged on the vertical bank section, and ends of the vine plants are bonded to the climbing net through cotton ropes; and the unit blocks are backfilled with nutrient soil, herbaceous plants and suffruticosa plants are planted, and the original riverway drainage effect is maintained while rigidity revetment ecologicalization is achieved.

Riverway rigidity revetment ecologicalization method

The invention discloses a method for planting orychophragmus violaceus by vegetation-type ecological concretes. The method comprises the following steps of: punching planting holes on the vegetation-type ecological concretes; filling quartz sand into the planting holes punched on the vegetation-type ecological concretes; performing dibble seeding orychophragmus violaceus seeds which are gathered in current year into the planting holes in the second half of September according to three seeds per hole; covering the quartz sand on the planting holes, and spraying clean water every day to keep moisture on the quartz sand; performing thinning after young seedlings totally penetrates out of the quartz sand to only keep one plant in each planting hole; putting the orychophragmus violaceus planted by the vegetation-type ecological concretes under the natural condition to grow; and finally, enabling the orychophragmus violaceus to bloom and have seeds on the vegetation-type ecological concretes. With the adoption of the method, the use value of the ecological concretes can be greatly increased, the technology is stable and reliable, high survival rate can be guaranteed and the management cost is low; and meanwhile, the aims of protecting city vegetation variety and constructing city ecosystems can be fulfilled.

Method for planting orychophragmus violaceus by using vegetation-type ecological concretes

The invention discloses water retaining and cooling concrete and a preparation method thereof. The water retaining and cooling concrete is prepared from matrix concrete and water retaining mortar; thematrix concrete is prepared from water, cement, coal ash, aggregate and a water reducing agent; the water retaining mortar is prepared from water, cement, coal ash, water-absorbent resin and river sand. The water retaining and cooling concrete has excellent water retaining and cooling effects, by compressive strength and breaking strength both meet standard requirements. After the water retainingand cooling concrete is applied to a pavement to form a water retaining and cooling pavement, the water retaining and cooling pavement absorbs moisture to suppress pavement flying dust, urban heat island effect can be abated, and tracks are effectively reduced. In addition, the preparation method is simple and easy in operation and implementation.

Water retaining and cooling concrete and preparation method thereof

The invention provides a method for preparing vegetation form porous concrete, adopting the 'pre-coating' technology, a slurry body with specific compositions coats coarse aggregates to form a sphere with a relatively uniform particle diameter, based on the physical coacervation of the sphere and the agglutination of the surface slurry body of the sphere; and the porous and macroporous structure, the cementation between solid phases of which is good and gas phases of which are communicated, is formed. The method comprises the concrete preparation steps that: (1) the fluidity and the viscosity range of the slurry body used to coat the aggregates are determined, and the mixing ratio is worked out by an absolute volume method; (2) the four-step stirring working procedure and the shaping model of the combination of the vibration and the pressuring are adopted; and (3) hole spaces are subjected to alkali-sealing treatment. The invention solves the difficult problems existing in the prior method that because of the downflow of the slurry body, the distribution of the pore spaces is not uniform and the discontinuous pore spaces increase, and the alkalinity in concrete pore spaces is relatively high, which are adverse to the growth of plants. When the vegetation form porous concrete prepared by the method of the invention is applied to road shoulder separator inserts, construction roofs, protection banks and protection slopes and parking lots of a highway, and good landscape effects and ecological environmental protection significance are achieved.

Jiangxiong Wei

Papers

Method for preparing vegetation form cellular concrete