What is precast concrete?| Quick facts

Precast is a method of industrialized design, production and construction using precast concrete products. The industrialized process is an advantage that enables quick long …

Flowshop scheduling model for bespoke precast concrete production …

Benjaoran et al. (2005) proposed a multi-objective flow shop scheduling model for bespoke precast concrete production planning and used a genetic algorithm for its solution. Benjaoran and Bhokha ...

Productivity Gains in a Line Flow Precast Concrete Process …

Kaizen method a lean production technique is used in this research, this paper focuses on two fundamental lean concepts, eliminating the non-value added activities and improving value added activities which enhances the productivity. ... To do this, lean thinking employs Andon as its main solving techniques to line flow precast concrete ...

Stabilization and standardization of a precast production …

205 STABILIZATION AND STANDARDIZATION OF A PRECAST PRODUCTION PROCESS Carlos Antonio Samaniego Gallardo1, Ariovaldo Denis Granja2, Flavio Augusto Picchi3 and Alex Tort Folch 4 ABSTRACT Adapting and implementing new management techniques based on principles and tools originated in the manufacturing industry have …

Research on production process optimization of precast …

The purpose of this paper is to investigate the process optimization of a precast concrete component production line by using value stream mapping.,This paper is an empirical focused on of lean production theory and value stream mapping. The data in the case study were collected in real time on-site for each process during the …

Process reengineering and improvement for building precast production …

Reducing the cost and/or production time by reengineering the configuration of the precast production line is the aim of this study. Based on experience in other industries and a literature review, we outline a framework for improving the precast construction production process currently adopted country-wide in Taiwan. This …

Precast production scheduling using multi-objective genetic …

Moreover, the production of hollow-core was automated and mechanized and required hollow-core production lines. Production scheduling of precast components have different methods, and proposed ...

Optimized rescheduling of multiple production lines for …

Compared with other precast components, precast wallboards and semiprecast slabs are processed on the flow production line, which is an important symbol for component factories from manual ...

Improving the Performance of Precast Concrete …

techniques are implemented as lean techniques (LT) to improve the production stage of PPCs. According to the results, the total time, cost, and idle time of the production …

Precast Construction In India And Its Future Ahead

Precast Frames Precast frames can be constructed using either linear elements or spatial beam column sub-assemblages.Precast beam-column sub-assemblages have the advantage that the connecting faces between the sub-assemblages can be placed away from the critical frame regions; however, linear elements are …

Precast Construction Technology | Types Of Precast …

Precast construction technology consists of various precast elements such as walls, beams, slabs, columns, staircase, landing, and some customized elements that are designed for the stability and durability of the building. Precast Hollow Core Panels. Precast residential buildings involve the design, planning, lifting, handling, and transport ...

Statistical Quality Inspection Methodology in …

The material can be used to implement design ideas in various architectural styles. Economy: An important advantage of precast concrete elements is the production process itself; it ensures a low level of material consumption (concrete and steel). The prestressed process saves up to 50% of steel and higher.

What is Precast Concrete and What Is It Used For?

Precast concrete is a construction material created by pouring concrete into a preshaped mold. The concrete is then left to cure in an appropriate environment. Once cured, the mold is removed and reused. The precast concrete product is then taken to the job site and used for the project. For instance, if designed to be walls, the precast ...

Optimizing carbon emissions of precast production in off …

Based on studies of fixed precast production lines, (Benjao ran et al. 2005) systematically modeled 135 the scheduling of customized precast produ ction, applyin g genetic algorithms to minim ize ...

precast line production techniques

precast line production techniques. Automating the Future. Partnering with an automated plant system manufacturer relieves precasters of some of the headaches associated with building a new plant, including planning and training. In 2004, Foley Products partnered with Schlüssel to build an automated, 90-foot-wide by 175-foot-long manhole riser ...

State of practice of automation in precast concrete production

According to Ref. [6] the degree of automation is more advanced in the precast concrete component production than any other part of the industry.With concrete being the most utilised building material worldwide [7, 8] a high ecologic potential, in regard to resource-efficient design and production through automation, is available.Automated …

Process reengineering and improvement for building precast production

The reengineering for production involved two steps. The first step was to perform a field study which was conducted in a precast factory in order to observe, measure, and collect data about the characteristics of the production work. This was necessary to obtain an in-depth understanding of the system production.

Reinforcement learning approach to scheduling of precast …

Highlights. •. A novel production scheduling model is proposed for reliable supply of precast concrete (PC). •. The production scheduling model is developed based on reinforcement learning. •. The model shows better performance in terms of total tardiness compared to existing dispatching rules. •. It can achieve successful project ...

Production scheduling of prefabricated components …

The conventional precast production scheduling model is based on a mobile assembly line production system, which represents the direct production process of precast components and aims to optimize ...

ULTRA HIGH PERFORMANCE CONCRETE (UHPC)

Recognizing that production methods must be reassessed for UHPC production, it is a fundamental change to conventional manufacturing processes. For instance, precasters …

Wet Press Technique for Precast Concrete Products

Abstract. Wet pressing is a latest technique used in the production of precast concrete units like drain cover slab, kerb stone, paver block etc. In which the wet concrete is pressed within the mould (s) for 10–30 seconds using hydraulic pressure to attain the desired shape by expelling extra water present. Pressed product is …

The quality management in precast concrete production …

Total quality management. Total quality management (TQM) is a management philosophy and a set of techniques/procedures, involving a total system approach to quality (Zhou and Lee 2000).The concept was already introduced at the beginnings of the 1960s and since then has attained a high reputation in Japan and other …

Dynamic response to demand variability for precast production

To achieve dynamic production planning, a Two-level Rescheduling Model for Precast Production with multiple production lines is developed to minimise the rescheduling costs based on genetic ...

Precast production scheduling in off-site construction: …

For instance, Yang et al. (2016) proposed a scheduling optimization model that focused on the precast production of multiple production lines. Several practical optimization objectives and constraints were integrated into the scheduling model, such as the objective of minimizing the variation in the type of PCs during the production …

A deep reinforcement learning based algorithm for a distributed precast

4.3. Decoding. The objectives of a solution can be calculated once the completed solution is provided. The corresponding processing times and setup times of Fig. 3 is listed in Table 1, Table 2, respectively.From Table 1, jobs 2 and 3 are in family 2, and jobs 1 and 4 are in families 1 and 3, respectively; the due date of each job is provided, …

Flowshop scheduling optimization for multi-shift precast production

There is a precast plant with a flow production line that produces a variety of precast components. Precast production involves six processes, as shown in Fig. 1. M is used to represent the set of these processes, M = {M 1, M 2, …, M 6}.The six processes are mold assembling (M1), reinforcement setting (M2), concrete casting (M3), curing (M4), …

PRECAST CONCRETE ARCHITECTURAL REPAIR GUIDE

collection of best practices commonly used to repair precast concrete. The guide explains procedures and time-proven techniques used to make a multitude of precast concrete repairs. Precast concrete product repairs can be related to engineering and design, production, handling, shipping, erection, other trades (typically on the job site), job site

GA-based decision support systems for precast production planning

However, most precast fabricators currently propose production plans depending on the rule of thumb, resulting in squandered resources and postponed delivery. Computerized scheduling techniques ...

Layout Optimization Model for the Production Planning of Precast …

Precast concrete comprises the basic components of modular buildings. The efficiency of precast concrete building component production directly impacts the construction time and cost. In the processes of precast component production, mold setting has a significant influence on the production efficiency and cost, as well as reducing the resource …

Precast concrete production technology and plants

Precast production in a pallet carousel system. Over the years, the pallet carousel systems was invented due to increasing labor costs and higher quality requirements. This production method is characterized by …

Optimized flowshop scheduling for precast production …

In a precast production line, precast components are produced on bench formworks that move through tracks at different stations. ... unified resource optimization scheduling for the job shop and reduced the cost and time required for different precast construction techniques while improving safety [23]. In the abovementioned studies, …

Preliminary Productivity Analysis of Conventional, Precast …

Where P is the productivity, I is, in the case of cost, the total cost (i.e., labor, material, and equipment), and, in the case of time, the total work-hours used, and O is the output or amount of quantity installed (e.g., cubic meters of concrete).. The cost of the equipment is automatically included in the calculation for costs for conventional …

Wall Panel Production Plant | Concrete Wall Equipment | TANY

Shandong Tianyi Machinery (TANY) is a production enterprise focused on the manufacturing of prefabricated construction equipment. Founded in 1998, we work continuously to develop new machinery and techniques to satisfy the needs of our customers. Our main products include construction wall panel production lines, precast …

Precast production scheduling using multi-objective …

3.1. Precast modeling. Precast production can be divided into six steps: (1) mold assembly, (2) placement of reinforcement and all embedded parts, (3) concrete casting, (4) curing, (5) mold stripping, and (6) product finishing, as depicted in Fig. 2. The mold assembly activity provides a specific dimension.

Precast concrete production lines | Elematic …

Precast concrete production lines for hollow core slabs, double walls, sandwich walls, beams, columns, 3D modules. Click: elematic

Green optimization for precast production rescheduling …

The factory has two production lines that supply prefabricated stairs, exterior wall panels, balconies, shear walls, composite floors, and roof parapets for off-site construction projects. The parameters input to the model include component type, component quantities, operation time and operation power of each process, due dates, …