Concrete slurry: composition, application and how to remove?
Slurry Safe is a safe yet functional replacement for traditional hydrochloric acid treatments and other commonly used processes. It is non-regulated by the US DOT, Canadian TDG and carries a triple zero hazardous materials information system score. Slurry Safe biodegrades in less than 10 days and is manufactured with products chosen from the EPA’s design for the environment, safe chemical ingredients list, that meets the criteria for design for the environment safer product program.
Slurry Safe is a multi purpose product and can be used in a multitude of ways:
Diamond Tool Cleaner
Slurry Safe is a powerful tool for cleaning concrete or stone slurry buildup off of equipment and surfaces.
Use the following procedures and precautions for best results:
Slurry Safe is a concentrated acid “AR” and can be used full strength or used diluted up to 50:50 with water.
Remove as much surface buildup as possible with a rubber mallet and scraper. Take care not to scratch painted surfaces.
Spray Slurry Safe onto all surfaces – Slurry Safe reacts similarly to hydrochloric acid, attacking calcium based slurries. It is best to use an all plastic pump up sprayer for application.
Allow the Slurry Safe to dissolve calcium buildup. Scrubbing with a soft bristle brush can aid in spreading cleaner into all areas.
Heavy buildup may require several coatings – Continue until surface is clean.
After application, rinse surface well to remove residue. It is recommended to use a pressure washer, the Slurry Safe will neutralise with water.
Please take care not to allow rinse water from running into a storm drain or off cleaning slab the use of a Wet vacuum for cleanup is recommended.
The use of a high pH Neutraliser is recommended. Simix MSX is an 11 pH cleaner with titanium dioxide additive to reduce flash rust on metal surfaces. If this is not available a mixture of sodium bicarbonate “baking soda” and water will help stop the reaction. Surface rust is not damaging to equipment and can be removed by repeating Slurry Safe application.
For better results, after cleaning and neutralising blow dry the surface(s) and coat with Simiz Ceramic Coating to seal metal surface(s) from oxidation and helps reduce future surface adhesion. If Ceramic treatment is not used, coat metal surfaces with WD40 or foam oil to prevent surface oxidation rust.
Please note that is the cleaning slab is unsealed then wet the floor with Simiz MSC or baking soda solution before use to reduce Slurry Safe reaction to concrete surface. Do not clean equipment on finished floors.
After cleaning vacuum the residue off the floor and add to the slurry drum to aid in pH reduction. Slurry Safe has no negative effect on Slurry Sep flocculant.
Dispose of the residue properly. Slurry Safe is safe for most surfaces but do not allow to stand or soak on none ferrous, soft metal surfaces like aluminium for an extended time or etching or discoloration may occur. Do not use fittings or store in aluminium tanks. Use the proper PPE as with any cleaning process. Slurry Safe requires no special handling as with hydrochloric acids. Follow manufacturer recommendations.
Slurry Safe will also pull oil out of a concrete floor!
Slurry Destroyer
You now get the power of a strong acid without any of the hazards with Slurry Destroyer, this amazing cleaner utilises state of the art surfactant technology and a small molecular size to penetrate deep inside the pores of residual concrete to react within. It is this unique formulation that makes it ideal for cleaning and maintaining the below:
This product does not contain muriatic, sulfuric, phosphoric, hydrofluoric or hydrochloric acids. Because of its less corrosive nature this product can be used on most metals , painted and plastic surfaces without any concern of etching or damage.
Use the following procedures and precautions for best results:
Apply Slurry Destroyer with a low pressure foam applicator.
Allow 15-30 minutes dwell time for maximum penetration.
Reapply if the surfaces becomes dry, keep the surface wet during cleaning.
When the surface begins to blister or pinhole, scrape to confirm the softness of residue.
Power wash surface to remove concrete residue.
Reapply and repeat for heavy build up. Approximately 1/8” – 1/4” removed each time.
Slurry Dry
SlurryDry is a non-hazardous and environmentally super absorbent used in industry to solidify slurries into landfill accepted solids. SlurryDry absorbs 200-300 times its weight in high pH waste water forming a stable, non-flowing solid from concrete slurry that is easy to manage and dispose of. Our non leaching formula will also accelerate evaporation in the landfill.
SlurryDry only adds 1-2% to waste volume for decreased hauling costs and solidifies immediately reducing process time. SlurryDry will help pass the landfill PFLT, will help waste pass TCLP Toxicity Characteristic Leaching Procedure (EPA Method 1311) and helps pass EPA 9095B paint filter test for compliant landfill disposal.
Use the following procedures and precautions for best results:
Add 1 lb of SlurryDry for each 5-10 gallons of slurry. If excess water has been removed, dosage is reduced.
Mix until all drying crystals have made contact in water to start absorption.
Add SlurryDry if a dryer consistency is desired.
Evaporation will reduce bulk weight over time through evaporation.
Please be aware that floor application can cause a slippery surface. It is best to use a Wet Vac for collection.
For concrete slurry processing vacuum slurry into a drum and deposit into containment drum or pit for solidification. Mix solidification agent into slurry at 1IB per 5-10 gallons, mix until solidified normally this will take less 5 minutes reaction time. Shovel into bin bags and deposit as normal construction waste.
Slurry Sep Flocking Agent
SlurrySep is a proprietary blend of bentonite clay, polymers and pH reducing acids and is designed for treatment of concrete slurry. The results are dramatic as solids quickly separate and condense on the bottom, leaving clean water for reuse or compliant discharge. SlurrySep replaces the high collection, handling, hauling and disposal costs incurred normally when dealing with concrete slurry. The rapid separation of suspended concrete in water allows the recycling of water or compliant disposal.
The chemical components of the SlurrySep adjust the pH of the water which enhances the precipitation of metals and breaks oil emulsions, the bertonite clay particles attract and encapsulate precipitated metallic ions. While the polymetric portion of the formulation attracts the remaining oils and suspended solids and forms a oc, which settles to the bottom of the treatment vessel. The bentonite clay and polymer work together to create a strong utterable floc, which will encapsulate and contain heavy metals while allowing the floc to readily release water resulting in condensed thickened sludge-like material. The entire process is completed in just a few minutes, resulting in clear water that can be discharged directly to a POTW or recycled.
The remaining sludge and its encapsulated contaminates are gighly resistant to leaching and is prepared to be solidfied for compliant land disposal.
All wastewater may not be compliant for land II disposal even after treatment methods due to hazardous levels of non-allowed contaminates. Waste water from plating shops and industrial chemical manufacturing facilities will require a wastewater analysis to determine the proper disposal method if applicable.
You may also add SlurryDry to the remaining thickened sludge material to dehydrate the remaining moisture and create a safe material for standard disposal that meets the requirements for the EPA 9095B Paint Filter Test for adequate moisture levels. SlurryDry’s main ingredient is EPA compliant as an acceptable non-biodegradable sorbent. SlurryDry adds further encapsulation of containment’s and its high resistant to leaching providing a cost effective method of safe disposal.
Concrete Slurry Control 101: 3 Proper Handling Tips from the Experts
Is the concept of concrete slurry control new to you? If yes, keep reading and we will discuss с you its proper handling so you could execute it efficiently. The diamond grinding and concrete sawing processes produce an inert residue that is not hazardous. This byproduct is called concrete slurry dewatering, and it separates the concrete slurry into solids and clean, clear water. The typical composition of slurry includes two components: cooling water and concrete fines that have been brought into suspension through either the grinding or sawing procedure. Saw blades are given water in order to lengthen the amount of time they are expected to last, reduce the amount of dust that they produce, and improve the safety of the workers. But to completely mitigate the perils thereof, concrete slurry control must be implemented throughout the construction process. And for starters, here’s 3 proper handing tips from experts in executing concrete slurry control efficiently.
1. Solid Handling
The issue with solids is that they are resistant to motion of any kind. Because of this, the solids will frequently settle out of the slurries, thus making concrete slurry control hard. Because the movement of the liquid is the only factor that can stop such settling from occurring, we refer to slurries as either settling or non-settling. When operating with solids that accumulate in pipework or vessels, these correlations don’t tackle the matter of the pressure-drop/flow frequency characteristics that arise. The movement of the solids that are settling is a complicated process. Therefore, we have no choice but to rely on immediate scale-up methods that have already been shown to be effective for solids that do not settle. It is possible to increase the velocity further than the point of settling, which is known as saltation or choking. However, this will result in a higher pressure drop as well as increased pipe erosion and particle breakage. A good alternative to ensure the successful scaling up of a process is to transform a solids suspension that settles into one that does not settle.
2. Sludge Collection and Pond Emptying
It is possible to collect the slurry in watertight lug units and then transit it to lined settlement reservoirs that have been assembled by the owner or operator in concrete slurry control. These ponds are not suitable for use as long-term treatment facilities. It is permissible to build these ponds either inside or outside of the right-of-way. The engineer must give his or her stamp of approval to every location. In order to facilitate the settling of the solids and the sieving of the water for subsequent utilisation in the grinding process, these ponds will need to be constructed.
When the grinding process is finished, any excess water will be enabled to evaporate before the next step in concrete slurry control is taken. After they have been dried, the solids that are left over can be used as a backfill, as an element in recycled aggregate, or in any other application that is commercially useful. On-site management is possible for up to 0.5 cubic yards of concrete slurry solids at a time. If the solids from the concrete slurry are to be buried on the property, they must be buried at a depth of at least three feet below the substrate and cannot be buried closer than three feet to the groundwater level.
3. Slurry Spreading Method
In more rural areas that have slopes covered in vegetation, the slurry from the grinding process can be accumulated on the in-slopes as the operation moves further down the road. According to the design, the in-slopes need to have a gradient of 3:1 or less, should have a discernible upland back-slope, and the slurry needs to be deposited at a rate that prevents it from reaching the moistened perimeter of the highway trench. These requirements must be met for this concrete slurry control. There are some situations in which areas that do not have a discernible upland back-slope may also be adequate. Prior to disposal, in-slope disposal areas need to be reviewed by the property owner and the operator (the contractor), and both parties need to come to an agreement about whether or not the area is suitable. This will ensure that the slurry does not run down into the wetted perimeter. In certain areas, it’s possible that additional monitoring is required. Prior to the beginning of any grinding or trimming operations, the owner or operator of the property is responsible for conducting a site inspection to locate environmentally sensitive areas. The absence of a discernible upland back-slope may be an indication that the highway is located near a lake, stream, or other type of wetland. Check the documentation of the project for any mention of environmentally sensitive areas, such as areas with native vegetation or the like.
The slurry that is produced as a result of grinding in unauthorised areas must be collected and transported to the job site, where it will be disposed of in an area and taken under concrete slurry control that is not sensitive to the environment.
It is not permissible to let the slurry stream across the roadway into the lanes that are adjacent to it. The diamond grinding equipment must be outfitted with a vacuum system that is regularly maintained and has the capacity to remove all standing slurry. This will result in the roadway being left in a soggy condition after the shredder has passed over it.
Concrete Slurry Disposal Sydney
Concrete slurry control is a service that Advance Cutting offers, and we also remove slurry when it’s required. We will collect the slurry from the top of the surface with a wet vac, and then transport it in our cart to the barrels where it will be stored. Because Advance Cutting is apprehensive about the environment, the construction site will always be left in pristine condition after they leave.
Get a quote for our slurry control services by filling out the form below:
Improving Saudi Class G Oil-Well Cement Properties Using the Tire Waste Material
Это статья в открытом доступе, опубликованная в соответствии с лицензией ACS AuthorChoice License, которая разрешает копирование и распространение статьи или любых ее адаптаций в некоммерческих целях.
Абстрактные
After oil and gas well drilling, they should be cased and cemented to ensure the stability of the wellbore and to isolate the trouble zones. To achieve these jobs, several additives are incorporated into the cement slurry to improve the cement matrix durability, especially at temperatures above 230 F. The tire waste material is an industrial waste that comes from automobile tires. The purpose of this work is to investigate the prospect of utilizing tire waste in oil-well cement under high-temperature and high-pressure conditions of 292 F and 3000 psi. Three cement samples with different concentrations of the tire waste material were prepared. The effects of tire waste on the cement rheological properties, elastic and failure parameters, and permeability were examined. The results showed that adding 0.3% by weight of cement (BWOC) of the tire waste material considerably improved the cement to the cement slurry and cement matrix properties, and it decreased the cement plastic viscosity by 53.1% and increased its yield point by 142.4% compared to the base cement. The cement samples with 0.3% BWOC of tire waste have Young’s modulus which is 10.8% less than that of the base cement and Poisson’s ratio of 14.3% greater than that of the base cement. By incorporating 0.3% of the tire waste, both compressive and tensile strengths of the cement increased by 48.3 and 11.7%, respectively, compared with those of the base cement. The cement permeability was decreased by 66.0% after adding 0.3% of the tire waste. Besides the improvement in the properties of cement, the use of the tire waste material has other economical and environmental advantages because these are very cheap materials dominant in our life.
1. Введение
Oil-well cement is one of the most important materials in drilling operations. 1 After drilling the well, the cement is pumped into the annulus between the wall of the formations and casing. 2 The cement has many functions that can be divided into primary and other functions. Primary functions are isolating formations with high porosity from having cross flow with different zones, carrying the casing weight, and supporting any applied load. 3 Other functions are preventing unwanted downhole fluids from being produced, protecting the casing from having corrosion, and restraining abnormal pore pressure. 4 According to Nelson, 5 the significance of an appropriate cement slurry depends on the point that without proper isolation of trouble zones, the well might never achieve its maximum potential of production.
The design of a cement slurry usually includes several additives and materials, and these should be compatible with others and able to perform different functions to provide cement matrixes of high quality. 6,7 For instance, silica flour is used to enhance the strength and maintain lower permeability, 8 weighting materials are used to increase the density, 9 accelerators are used to reduce the setting time, 10 retarders are used to delay the setting time, extenders are used to decrease the density, 11 dispersants are used to reduce the viscosity, fluid loss agents are used to control the leakage of the aqueous phase of the cement, and defoamers are used to prevent foaming. 12
An appropriate laboratory experiment is required to optimize the cement formulation to improve the cement properties. 13 Recently, many researchers examined the impacts of various materials on the cement properties, for example, olive waste, 14 laponite, 15 nanoclay, 16,17 cellulose nanofibers, 18 granite sludge, 19 polypropelene fibers, 20,21 metakaolin, 22 rice husk ash, 23 silica flour, 24 silicon carbide powder, 25 iron ore tailings, 26 and sugarcane biomass waste. 27
The application of waste materials in oil-well cement is extremely encouraged from the environmental perspective because industrial wastes can lead to many issues to the environment and human health when disposed of in an inappropriate way. 28−30 Tire waste discarding leads to biodiversity reduction; also, tires contain soluble and poisonous elements. 31 When tires begin to torch because of incidental reasons, high temperature occurs and harmful exhausts are created, and the high temperature makes tires to melt, so oil will be produced and pollute soil and water. 32 Moreover, the transportation and discarding of these wastes require considerable costs. Therefore, researchers have looked for choices to join these deposits in other industrial operations, thus decreasing costs and the ecological effects produced by the improper waste removal.
1.1. Tire Waste Material and Its Applications
Tire waste is a reused material obtained from a huge quantity of scrapped vehicle tires. Tire waste is produced by two main processes, that is, ambient and cryogenic. 33 The ambient method provides a tire waste material of a comparatively large particle size, where the mechanical processes to cut and grind the tire material to certain sizes are under ambient temperatures. The size of ambient tire waste ranges from very fine particles (less than 0.6 mm) to coarse particles (3–13 mm). Cryogenic methods start with around 50 mm shredded scrap tires which are placed in liquid nitrogen, to cool the material under temperatures less than −112 F, causing the material to be brittle and easily crushed and ground to the required sizes of less than 0.6 mm. 34 After the ambient and cryogenic processes, the separation process starts to remove the contaminants from the materials such as fibers and steel.
There are many applications of tire waste in several industries. It is suggested to be used in concrete structures found in the regions of serious earthquake risks and severe railway sleepers. It is also applied to construct the barriers of noise reduction. 35 Tire waste materials have been utilized as a secondary material in the pavement industry to decrease pavement cracking and increase the thermal stability. 36−38 Studies also showed that the performance of concrete has high dependency on the aggregation of tire waste. 39 The use of tire waste in concrete cement showed that tire waste can enhance cement deformation ability and mechanical properties. 40−43
In the petroleum industry, tire waste was used by Al Awad and Fattah. 44 They tested a good fracture seal material made of shredded waste car tires in the lab to see its ability to plug a fractured core sample under high-pressure and high-temperature conditions. Agapiou et al. 34 investigated the impacts of three types of waste tires on the mechanical properties of cement. The three types are tire buffings, tire rubber crumbs, and ground rubber tires. Their results showed that tire buffings and tire rubber crumbs exhibit similar compressive strength and tensile strength. However, the ground rubber tire has the highest compressive strength and tensile strength.
Xiaowei et al. 45 used a modified crumb tire waste material to enhance the adhesion and the mechanical properties of cement. They used several techniques to evaluate the surface properties of the crumb tire waste and the cement. Li and Guo 46 studied the impact of tire powder in oil-well cement and revealed that the tire waste increases the elastic deformation capability of the cement. Tire waste is modified by the plasma technology with less temperature and reduces the elastic modulus, which leads to the enhancement of elastic and plastic deformation capability. 47,48 The microstructure of cement containing tire elastic particles was examined by Liu et al., 49 and they concluded that the cement deformation capability is improved, and the elastic modulus is decreased.
The purpose of this work is to assess the possibility of using the tire waste in oil-well cement under a high temperature of 292 F and a high pressure of 3000 psi. The effect of using different concentrations of the tire waste material on the cement rheological properties (yield point and plastic viscosity), elastic properties (dynamic Young’s modulus and dynamic Poisson’s ratio), failure parameters (compressive and tensile strength), and petrophysical properties (permeability) was evaluated.
2. Materials and Methodology
2.1. материалы
Three cement slurries were formulated with the composition of Saudi Class G cement, silica flour, a weighting material, a fluid loss controller, a dispersant, a retarder, an expander, water, a defoamer, and the tire waste material. These samples were prepared following the American Petroleum Institute (API) standards. 50,51 The cement slurries were prepared with a water-to-cement ratio of 0.44. Saudi Class G cement and all other additives used in this study are provided by a service company.
Table 1 lists the concentration of the different additives used to make the three slurries prepared in this work; as indicated in this table, the disparity between the three cement slurries is the tire waste material’s concentration, while all remaining additives have the same amount in all the slurries. The first slurry (TWM0) is the base slurry which has no tire material, the second slurry (TWM1) contains 0.1% by weight of cement (BWOC) of the tire waste material, and the third slurry (TWM3) has 0.3% BWOC of the tire waste material.
