A pervious concrete composition comprising a superabsorbent polymer in a proportion of 0.03 0.07 wt. % cement, preferably about 0.045 wt. % of cement, thereby enabling a water:cement ratio of 0.35 0.50. The superabsorbent polymer can be a cross-linked sodium polyacrylate-acrylamide/acrylic acid copolymer, and is introduced in powdered form to a concrete mix, wherein it is hydrated during the mixing process. The pervious concrete compositions herein can therefore be made with a desirable water:cement ratio and without the need for water-reducers or viscosity modifying additives. The invention further comprises methods of installing the pervious concrete compositions.

Migration of formation solids in a wellbore is restrained by feeding a slurry, comprising water, a viscosifier, and a concentration of cement clinker particles, into the wellbore, and hydrating the clinker particles in the wellbore. The clinker particles are kept in suspension during the hydrating, and upon completion of the hydrating the hydrated clinker particles form a hardened cement consisting of a permeable structure of interconnected hydrated clinker particles. A layer of degradable lost circulation material (LCM) may be employed to separate the slurry with clinker particles from the formation surrounding the wellbore during hydrating of the clinker particles.

Implementations described and claimed herein provide a process for creating a low-buoyancy cellular concrete that may include cement, water, and various surfactants including hydrophilic additives to produce the low-buoyancy cellular concrete. The low-buoyancy cellular concrete wet mix maintains its cellular properties while it is placed and cures. After curing, water may be absorbed into the low buoyancy cellular concrete via a combination of physical and chemical characteristics. An open cell structure of capillaries facilitates wicking action of water into the low buoyancy cellular concrete via capillary channeling (through the cementitious matrix between the micro-bubbles, and in some cases into the micro-bubbles as well). Further, the hydrophilic additive in the foam surfactant facilitates absorption of water into the low buoyancy cellular concrete through diminished surface tension at an interface of the cellular concrete and a body of water and at and between the microbubbles.

A method is provided for preserving cooking oil in a food fryer which comprises contacting the oil in situ with at least one oil-permeable cement body which is a stand-alone block and which has been hydraulically hardened from a paste comprising (i) white OPC clinker, (ii) white OPC or (iii) a mixture of white OPC clinker and white OPC, wherein the porosity of the cement body, estimable from the difference between its water-saturated and dry weights, is 30-55%, pores in the body being oil receptive by virtue of low un-bound water content.

A pervious concrete composition comprising a superabsorbent polymer, thereby enabling a water/cement ratio of 0.35-0.50. The superabsorbent polymer can be a cross-linked sodium polyacrylate-acrylamide/acrylic acid copolymer. The invention further comprises methods of installing the pervious concrete compositions.

Disclosed is a draining composition for a light-traffic road pavement, including: (a) a first granular layer having a percentage of communicating voids ranging 25-50%, including a binder and a granular mixture of which at least 80% by weight, relative to the total weight of the granular mixture, has a granular size distribution range 4-20 mm, the layer having a thickness suitable for the pavement's mechanical strength; (b) a second granular layer having main lower and upper surfaces, the main lower surface resting directly on the first granular matrix and the main upper surface in direct contact with the air, the second granular layer being a granular mixture not bound by a binder and of which at least 80% by weight, relative to the total weight of the granular mixture, has a granular size distribution range 2-14 mm, the second granular layer having a thickness appropriate for water accumulation.

A full-depth ultra-thin long-life pavement structure and a construction method thereof are disclosured. The pavement structure is disposed on a subgrade, and the pavement includes from bottom to top: a composite joint layer, a fatigue-resistant layer, a load-bearing layer, a high-strength bonding layer and a skid-resistant wearing layer; the composite joint layer comprises a bottom layer and an upper layer, the bottom layer is a graded gravel layer, and the upper layer is an open-graded large-particle-size water-permeable polyurethane and gravel mixture layer; the fatigue-resistant layer is paved by a skeleton-interlocking structural polyurethane mixture; the load-bearing layer is paved by a suspended-dense typed polyurethane mixture; the high-strength bonding layer is formed by curing a polyurethane-based composite material; the skid-resistant wearing layer is paved by a high-viscosity and high-elasticity modified asphalt mixture.

A permeable pavement system including a permeable pavement composition and a related method are provided. The permeable pavement system includes a first layer of a permeable pavement composition including a quantity of a first permeable pavement material and a quantity of cured carbon fiber composite material (CCFCM) incorporated therewith, the first layer defining a first surface; and a second layer of a second permeable pavement material deposited over a substantial entirety of and covering the first surface of the first layer of the permeable pavement composition, wherein the first layer interfaces with the second layer to at least strengthen the permeable pavement system.

An oil well cement composite permeation enhancement agent suitable for a hydrate layer and a preparation method thereof are disclosed. In parts by weight, the composition of raw materials of the composite permeation enhancement agent is 4.6 parts-5.0 parts of kerosene, 0.23 parts-0.25 parts of emulsifier, 0.8 parts-1.1 parts of modified polypropylene fiber, 10.0 parts-12.0 parts of porous and permeable microspheres, 1.0 part-1.2 parts of paraffin, and 57.5 parts-62.5 parts of water. The composite permeation enhancement agent can effectively improve the permeability of the cement stone which reshapes the formation framework and increase the mining rate of hydrate. The oil well cement composite permeation enhancement agent has the advantages of long-term performance, low cost, and green environmental protection. The composite permeation enhancement agent of the present invention does not need secondary treatment to increase permeation, the operation is convenient and fast, and the working time of holding pressure is reduced.

An expandable porous framework, the framework containing a dry cementitious powder fill that when exposed to an aqueous media, will expand against the constraint of the framework and set to form a solid, hard and coherent material, the formwork being porous to liquids but substantially impermeable to the powder fill.