Both slurry seal and micro surfacing are specifically-designed mixtures of asphalt emulsion, aggregate, water, mineral filler and additives, mixed in set proportions, and uniformly spread across a prepared surface. Here, …
is recorded (mixing time) • ing and coating are visually assessed • The test can be performed at expected field humidity and temperature conditions • Select the proportions that results in mixing times over 180 seconds for Slurry Seals or 120 seconds for Microsurfacing and good coating over the range of
Composition of mixture: The owner shall approve the design mix and all Slurry Seal materials and methods prior to use and shall designate the proportions to be used within the following limits: Residual Asphalt: 5% – 15% by dry weight of aggregate. Emulsion Content: 10% - 20% by dry weight if aggregate.
Slurry Seals. Slurry seal is a mixture of aggregate, emulsified asphalt, water and additives that are properly proportioned, mixed and spread over a prepared surface. A polymer-modified system can be used in the same application and will enhance one or more properties of the slurry to better meet a particular project requirement.
629–3.0 Thermoplastic coal tar emulsion sand slurry seal. 629-3.1 Quantities of materials per square yard. Based on the data in this specification, the Contractor shall submit the proportions of thermoplastic coal tar emulsion and aggregate proposed for use to the RPR for approval prior to the start of operations.
Street. Type II Slurry Seal consists of a mixture of polymer modified asphaltic emulsion, Type II aggregate, water, mineral filler, and additives. Slurry seal shall conform to the provisions of Section 37 "Seal Coats" of the 2015 Caltrans Revised Standard Specifications, including the provisions in Section 373, "Slurry -
Standard Practice for Slurry Seal Design This standard practice for mix design evaluation uses mixture properties to determine the proportions of emulsified asphalt, mineral aggregate, water, mineral filler, and additives to produce a... References This document references: AASHTO MP 32 - Standard Specification for Materials for …
Test results used in the mix design . 2. Proportion of the following material based on the aggregate's dry weight: Aggregate Filler determined from tests, target, minimum, and maximum ... component materials and the proposed slurry seal mixture shall conform to the requirements specified under Submittals, Materials, and other applicable content ...
There are three basic aggregate gradations used in slurry seals: Type I (fine). This type has the finest aggregate gradation (most are smaller than the 2.36 mm (No. 8) sieve) and is used to fill small surface cracks and …
The slurry seal uses a slurry seal paver to spread the emulsified asphalt, coarse and fine aggregates, fillers, water, and additives according to the design ratio into a thin layer technology that is spread on the original road surface. It has construction Fast, low cost, wide use, low energy consumption and so on.
ISSA TB 113 – Trial Mix Procedure for Slurry Seal Design Automated Mixing Test (AMT) ISSA TB 100 – Test Method for Wet Track Abrasion of Slurry Surfaces (WTAT) Cohesion-Abrasion Test () ISSA TB 139 – The Modified Cohesion Tester Automated Cohesion Test (ACT) Tests run at standard laboratory temperature and humidity conditions
Slurry seal shall consist of a mixture of an emulsified asphalt, mineral aggregate, water, and additives, proportioned, mixed and uniformly spread over a properly prepared surface as directed by the Buyer's Authorized Representative (B.A.R.).
Slurry seal is a cold mix coating consisting of fine crushed aggregate, emulsified asphalt, additives and water applied to roadways. Emulsion serves as a binder to hold the aggregate together and to adhere to the …
Additives may be added to the slurry seal mix during construction to provide control of the quick-set properties and to increase adhesion. Additives shall be compatible with the other components of the slurry seal mix. 337.05.06 Tack Coat Tack coat shall be the same emulsified asphalt used in the mix and diluted to 1 part emulsion to 3 parts
For mix design of Slurry Seals and Micros, there are several recommended sources including ASTM D3910, ISSA A-105 & ISSA A-143, and MS-19 Basic Asphalt Emulsion Manual. In the lab, blending of the materials that are to be used in the field is done in varying proportions to select the proper formulation.
Slurry Seal Design AASHTO Designation: PP xx-17 Technical Section: 2a Release: Group 3 (Month yyyy) 1. SCOPE 1.1. This standard practice for mix design evaluation uses mixture properties to determine the proportions of emulsified asphalt, mineral aggregate, water, mineral filler, and additives to produce a Slurry Seal job-mix formula. 2.
This standard practice for mix design evaluation uses mixture properties to determine the proportions of emulsified asphalt, mineral aggregate, water, mineral filler, and additives to produce a Slurry Seal job-mix formula.
Water, 0/0: 0.00 3.75 3.85 Mix #1 0.000 8.0 Cm. flow @ Cm. flow @ Cm. flow @ MIX 3.750 10.0 Slurry Seal Consistency 3.75d 10.0 3.850 12.0 Approx. Approx. 0.00 8.0 Added Mix Water, Percent (0/0) Cone Flow, Cm. Limits: 2 min - 3 max. Optimum Water, Yo: Results from graph: Maximum Water, 9.50 9.60 NOTE: Actual mixes showed 9%-11% water was …
Emulsified Asphalt Slurry Seal Surfacing. 1.2 Description The slurry seal shall consist of a mixture of an approved emulsified asphalt, mineral aggregate, water and specified additives, proportioned, mixed and uniformly spread over a properly prepared surface as directed by the OWNER. The completed slurry seal shall leave a homogeneous
As shown in Figure 2a, the consistency test was performed to determine the optimum mix design (i.e., proper ratio of aggregate, filler, water, and emulsion) of the slurry seal mixtures. ISSA TB105 suggests the use of 6.5–12% emulsion asphalt binder residue (based on dry weight of aggregate) in Type 3 slurry seals.
Slurry seal is a mixture of polymer-modified emulsified asphalt, mineral aggregate, mineral filler, water, and other additives, properly proportioned, mixed and spread on a paved surface. The mix shall be capable of being spread in a uniform thickness cross-section. The end product shall maintain a skid-resistant surface throughout the service ...
slurry surfacing shall be supplied until the mix has been approved by the Superintendent. For all approved mixes the Contractor shall remain fully responsible for the performance of the mix. The Superintendent shall also be notified before any changes are made to the components or proportions of components used in the approved mix.
Slurry Seal 32 12 36 - 4 1. Mixing test must pass at the maximum expected air temperature at the project site during application. 2. Using project source aggregate asphalt emulsion and set-control agents ... The report shall clearly show the proportions of aggregate, filler (as determined from the tests, minimum and maximum), water (m inimum and
Common mix proportions are listed below. Cement Fly Ash Soil Water • Clean concrete sand, no fly ash 100 0 3000 600 (1 sack mix) • Clean Concrete sand, fly ash 50 300 2700 600 (1/2 sack mix) • Silty sand, no fly ash 50 0 3000 …
Of the 21 respondents, 71 percent are currently using slurry seals and/or micro-surfacing and 76 percent plan to use it in the future. The 29 percent not using these treatments either do not have experience with these materials or they have experienced past short-term failures.
The Engineer may require any element to be adjusted or replaced to produce an acceptable slurry seal. Proportion the elements to produce a uniform mixture that meets the requirements of the Table below: Emulsified Asphalt Slurry Seal Mixture Mixture Control Tolerances, % Sieve Size % Passing ±0 3/8 in (9.5 mm) 100
Mixing shall be performed by continuous-ﬂow mixer. All aggregate particles shall be uniformly saturated and coated with asphalt. 302-4.2.2 Continuous-Flow Mixers. The slurry mixer shall be a multiblade or spiral continuous-ﬂow unit in food working condition capable of accurately delivering a predetermined proportion of aggregate, water,
the mix design process. The purpose of this test is to determine the minimum asphalt content required in a slurry seal system. The Wet Track Abrasion Test is not recommended as a field quality control or acceptance test. ISSA TB 136 describes potential causes for inconsistent results of the Wet Track Abrasion Test.