Method and apparatus for making and placing lightweight concrete
阅读：254发布：2022-09-27
专利汇可以提供Method and apparatus for making and placing lightweight concrete专利检索，专利查询，专利分析的服务。并且Immersing a lightweight porous aggregate for concrete in hot water in a container; then pumping cold water into the lower part of the container to displace the hot water so as to immerse the aggregate in cold water without exposure to the atmosphere, thus saturating the aggregate with water. Then removing the aggregate from the cold water and mixing it with cement, sand and water to make concrete, which is then pumped under pressure to a location for placement. An improvement being to provide two aggregate containers, and as the hot water is being displaced from the first container by the rising cold water, directing this hot water into the second container which contains aggregate and then back to the first container for another aggregate batch, thus conserving the hot water. A second embodiment being to immerse the aggregate in a steam atmosphere and then immersing it in cold water to saturate the aggregate which can then be mixed to make concrete and pumped under pressure.，下面是Method and apparatus for making and placing lightweight concrete专利的具体信息内容。
1. A method of making lightweight concrete capable of being pumped at high pressures without degradation of the concrete, said concrete comprising porous lightweight aggregate particles, said method comprising: a. causing liquid absorption of said aggregate particles by: 1. contacting said aggregate particles with liquid at an elevated temperature, and 2. contacting said aggregate particles with liquid at a lower temperature to complete liquid adsorption of the aggregate particles, and b. mixing said liquid absorbed aggregate particles with cement, sand and water to make concrete.
2. contacting said aggregate particles with liquid at a lower temperature to complete liquid adsorption of the aggregate particles, and b. mixing said liquid absorbed aggregate particles with cement, sand and water to make concrete.
2. The method as recited in claim 1, wherein after said aggregate particles are contacted with liquid at an elevated temperature, there is no substantial contact of said particles with surrounding atmosphere prior to said aggregate particles being contacted with liquid at a lower temperature.
3. The method as recited in claim 1, wherein said liquid is water.
4. The method as recited in claim 3, wherein said elevated temperature is at least 175* F.
5. The method as recited in claim 3, wherein said elevated temperature is at least about 200* F.
6. The method as recited in claim 3, wherein said aggregate particles are contacted with water at its approximate boiling point at atmospheric pressure.
7. The method as recited in claim 6, wherein the water at a lower temperature is below about 100* F.
8. The method as recited in claim 3, wherein steam is passed through said aggregate particles prior to the aggregate particles being contacted with water at an elevated temperature.
9. The method as recited in claim 3, wherein said aggregate particles are contacted with water at an elevated temperature for a time period of at least about 5 minutes.
10. The method as recited in claim 3, wherein said aggregate particles are contacted with water at a lower temperature for a time period of at least about 3 minutes.
11. A batch process for making lightweight concrete capable of being pumped at high pressures without degradation of the concrete, said concrete comprising porous lightweight aggregate particles, said method comprising: a. immersing a batch of said aggregate in hot water in a container having a bottom portion and a top portion, b. inserting cold water into the bottom portion of the container so that the cold water rises in the container to displace the hot water surrounding the aggregate particles upwardly and said aggregate particles become immersed in cold water, and c. then mixing said water saturated aggregate with cement, sand and water to make concrete.
12. The process as recited in claim 11, wherein said concrete is then pumped under pressure.
13. The process as recited in claim 11, wherein the hot water prior to being inserted into the container is heated under pressure to a temperature higher than about 212* F. and the hot water is inserted into the lower portion of the container whereby steam from the hot water rises through the aggregate particles.
14. A dual batch process for making water-saturated lightweight aggregate, comprising: a. immersing a first batch of aggregate particles in hot water in a container having a bottom portion and a top portion, b. inserting cold water into the bottom portion of the container so that the cold water rises in the container to displace the hot water surrounding the aggregate particles upwardly and saiD aggregate particles become immersed in cold water, c. directing the hot water being displaced from the top portion of the first container into a second container and thus immersing a second batch of aggregate particles in the hot water in the second container, and d. inserting cold water into the bottom portion of the second container so that the cold water rises in the second container to displace the hot water surrounding the second batch of aggregate particles upwardly and said second batch becomes immersed in cold water.
15. The process as recited in claim 14 comprising the further step of directing the hot water from the upper portion of the second tank to a third batch of aggregate particles to be water saturated.
16. The process as recited in claim 14, wherein hot water heated under pressure to a temperature higher than 212* F. is inserted into hot water in said second container so as to maintain the hot water in the second container at an adequately high temperature.
17. A process for making water saturated lightweight aggregate for concrete, comprising: a. immersing aggregate in H2O at an elevated temperature to displace gaseous substances entrained in said aggregate with gaseous H2O, and b. Without substantial exposure of said aggregate to surrounding atmosphere, immersing said aggregate in cold water to cause substantial water saturation of the aggregate.
18. The process as recited in claim 17, wherein said H2O at an elevated temperature is steam.
19. The process as recited in claim 17, wherein said H2O at an elevated temperature is water whose temperature is at least at the approximate boiling point of water.
20. A lightweight water saturated aggregate for concrete made according to the process recited in claim 17.
21. An apparatus adapted for a dual batch process of making water saturated lightweight aggregate, said apparatus comprising: a. a first and second aggregate container, each of said containers having an upper portion and a lower portion, b. a first conduit leading from the upper portion of the first container to the lower portion of the second container whereby water displaced from the first container flows into the lower portion of the second container, c. a second conduit leading from the upper portion of the second container to the lower portion of the first container, whereby water displaced from the second container flows into the lower portion of the first container, d. means to unload each of said containers, e. means to direct selectively hot and cold water into the bottom portions of each of said containers.
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